Research and Trips

Keeping Mumme

Keeping Mumme

Right now, Mumme is in fact the word. No, not the sparkling grape-derived drink with a similar brand name, but rather our new-but-old-but-new historically-inspired ale that hailed originally from Germany.

As you’ll know by now, we love a heritage beer at Beerblefish – our range based on nineteenth century recipes has been around for a few years and we’ve just decided to make our Viking Ale a permanent fixture (with a shiny new label – more to come on that) – and the latest style to take our fancy is from the German city of Braunschweig (or Brunswick in English). This style was called Mumme in Braunschweig, but was often written Mum in England.

In common with many more recent brews, there were two types of Mumme brewed – one was made for the home market and was low in alcohol, while the other was exported – known as Schiffsmumme because it was for shipping.

The people of Braunschweig had started brewing Mumme by the time it was first recorded in the late fifteenth century and it remained popular until the late eighteenth century, at which time its popularity started to wane – helped along in Britain by a high import duty no doubt designed to protect the British brewing industry. An ale called Mum continued to be brewed in Ireland (then part of the UK) but other beers took over and the style was consigned to the beer history books.

Braunschweiger Mumme’s demise predates the national adoption of the German beer purity law, but it is thought that this kind of ale brewed in northern Germany was part of the reason that Bavaria, in the south, introduced the law in the early sixteenth century, in order to protect Bavaria’s own beers from competition – Mumme used ingredients that fell outside the beer purity law, including herbs, spices and stone fruits (usually plums or prunes).

Our Mumme includes prunes, cardamom, cinnamon, camomile and orange peel, which are made into a kind of tea before being added to the wort. It took Michaela and Glenn a few tries to get the combinations and proportions right and they found it was better to brew a tea with each ingredient and then combine them, rather than starting with a mixture of ingredients.

The malt bill for our Mumme includes three types of malted barley (extra pale, crystal 150 and Munich malt) along with dark malted wheat. The only hop is Hallertauer Mittelfruh, which is used for bittering, while the spiced tea does all the work for the flavour and aroma.

The result is a dark, slightly smoky ale with a spicy and fruity edge to it and a silky mouthfeel. At 6.9% ABV, it’s quite robust, but still very drinkable and very different from anything we’ve brewed before.

You’ll find it now in our online shop and it will be available from our stockists very soon. Tried it? Let us know what you think!

Posted by Bethany in Beer Launch, Beer Styles and Recipes, Brewing, Research and Trips
2C or Not 2C? That is the Question

2C or Not 2C? That is the Question

The answer to this age-old quandary depends on a number of factors, including what type of beer it is, how good the beer is, and what the ambient temperature is where you’re going to drink it, but I think we can all agree that “2C” is never the correct temperature unless you’ve just run a marathon in a desert or something! However, one thing to remember above all is that the “right” temperature to drink a particular beer at is the one at which you enjoy it the most. If you prefer drinking your favourite beer at four degrees Celsius even though the brewery recommends 12 degrees Celsius, then go for it, it’s your choice – but it’s probably wise to at least consider the recommendation before dismissing it out of hand.

Note that we’re looking at serving temperature here, not storage temperature – that’s a whole different topic that’s become a talking point recently, and we might cover it in the near future – but in the meantime, let’s look at how cold (or warm) your beer should be when you take that first sip.

There has long been a friendly rivalry across the Atlantic Ocean between the Americans on the one hand, who tend to drink their beer cold and can’t understand why the British drink “warm” beer, and the Brits on the other hand, who assume that American beer is best served cold because it means you don’t have to taste it. 

Now, both of these points of view are based on an outdated impression of each nation’s beer culture and don’t take into account either the cross-pollination of styles and techniques that has happened in the last thirty years or so or the massive boom in independent and craft breweries in the USA that has seen a bit of a shift away from macro-produced light lager towards a varied range of interesting and tasty styles.

Traditional British (cask) beer is typically designed to be at its best when served at “cellar temperature” – around 12-13 degrees Celsius (about 55 degrees Fahrenheit). Older British pubs were built with cellars that would be at around that temperature and, when they were built, there wouldn’t have been much that a publican could have done about the temperature. It would have varied a bit with the weather, but it would have been assumed that beers would generally be served from a cask sitting in a cellar at 12 degrees Celsius. 

As refrigeration was invented and then became accessible to ordinary folk, the possibilities for beer expanded until we developed some unofficial rules for the temperature at which beer should be served. Generally, lighter (in colour) beers should be served colder than darker ones, weaker beers should be served colder than stronger ones and lagers should be served colder than other beers. There are exceptions to every rule, of course, including the golden rule above – drink it at the temperature you like it.

There are different schools of thought on just how cold the coldest-drinking beers should be served. Our view at Beerblefish is that four degrees is the absolute lowest temperature a beer should be served at, and that should be reserved for macro lagers that have little to no hop flavour. A tasty lager or a very pale ale should be a little warmer than that – maybe five to six degrees – and then other types of beer should get a little warmer from there.

The problem with serving beer very cold is that it inhibits the release of carbon dioxide (i.e. you don’t get as many bubbles rising to the surface and popping), and it’s the carbon dioxide that helps the aroma of the beer to escape into your nose as you go to take a sip. Aroma makes up a huge part of our beer drinking experience, so if we lose that part, it impacts our enjoyment of the beer as a whole. On the other hand, it can be difficult to regulate the pressure of a well-carbonated beer if it’s too warm – if it’s on draft, it will fob, and a bottle is likely to gush out like a Champagne fountain. So, that leaves us needing to find the happy medium between these two perils.

At Beerblefish we recommend that our Heritage Ales are served at British cellar temperature (12 degrees Celsius) – they are based on nineteenth century recipes, so the British pub cellar is their natural habitat. If it’s a very warm day, we might put a bottle of 1853 ESB or 1892 IPA in the fridge for a short while before drinking, but we’d rarely chill our 1820 Porter even when the sun’s shining.

Our contemporary beers have more varied needs. Our stouts and milds, particularly the imperial varieties, and Edmonton Best Bitter should also be at cellar temperature – as should Beerblefish’s new baby, Gingerbeerble – but many of our paler beers need a bit of chilling. We recommend that our Hoppy Pale Ale series, Cashmere Brut IPA and Pan Galactic Pale Ale should be served at around five to six degrees Celsius. That’s probably a little warmer than your fridge, so either don’t put them in for too long, or make sure you take your time in pouring them and finding your snacks to go with them! And don’t forget that your hands will warm up the glass, so there might be no harm in slightly over-chilling.

At the end of the day, we all have our preferences for beer temperature – some of those are based on expectation from our beer cultural experiences, and others just because we like something a certain way, but we at Beerblefish believe it’s important to keep an open mind when drinking beer because we might just learn or try something new one day that massively enhances our beer-drinking experience!

Posted by Bethany in Beer Styles and Recipes, Research and Trips
How We Design Our Beers – Part 2

How We Design Our Beers – Part 2

Last week we took a look at how we at Beerblefish design our range of Heritage Ales. This week, we’re moving onto how we create our contemporary beers. The current trend for drinkers wanting new and exciting beers all of the time means that we do a lot more of this than we do designing new heritage brews. It’s led us to creating a couple of series of beers where we only change one variable. 

The first of those series to come about was our Hoppy Pale Ale series. The brews are simply numbered in sequence and are designed to showcase hops and not the yeast or malt. The malt bill is 100% extra pale malt and we stick to a one hour boil time, pitching at 20 degrees Celsius for a clean fermentation – unlike our heritage brews, we’re not looking for the funky yeast flavours we can get by experimenting with fermentation temperature. 

We usually select two or three hops to include, carefully deciding (by smell) which of the hops we have in stock work well together. If there’s an exciting new hop out that we haven’t tried before, we might order it in and include it.

Following on from the success of the Hoppy Pale Ale series, we’ve got its first younger sibling, Hoppy Little Fish No.1, in the fermenter at the moment – this will be the first of our new series of table beers, still showcasing hops but at a lower ABV. Look out for it in a week or two!!

Our contemporary range isn’t all about hoppy pales, though. James Atherton, Beerblefish founder and MD, has an eclectic palate and likes to make a variety of styles, including stouts and milds. He says, “I generally don’t like to use roasted malts in dark beers. I prefer using chocolate malts for the softness they give in the flavour and mouthfeel.” He thinks this is a particular benefit when making a fruity stout, where it’s better to have chocolate and coffee notes, not burnt bitter notes.

Beerblefish occasionally ventures into lager, too. In that regard, we’re very traditional, and like to observe the German beer law, the Reinheitsgebot, even though we’re definitely not required to! We use German lager yeast, lager malt and we always use noble hops for bittering and at flame-out. We normally brew our lagers in winter, not summer, because the lager yeast is resilient to the colder temperatures and will still finish fermenting even when it’s freezing outside.

One part of the design process that James (and the rest of the team) always enjoy doing is grabbing 20 examples of the style of beer being created and sipping through them while making tasting notes. We can usually tell within a few minutes what malt bill, flame-out hops and style of yeast have been used and sometimes the rough temperature it’s been fermented at. However, sometimes there will be an enigma of a beer that’s more difficult to work out and there has been more than one time that James has woken up in the middle of the night with a Eureka moment, having realised what the hop he’d missed was.

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This isn’t to say, of course, that beer design should be simply about copying other beers, but it would be a foolish brewer who ignored the best examples of a style when trying to create a new recipe. It also helps to stimulate the imagination, so that new styles can be created and new variations on older types of beer can be tried.

Sometimes, though, the purpose of the beer is the driving force behind the creation. This time last year, I went to a dinner party and everyone was drinking wine. There were two or three elegant bottles with stylish labels sitting on the table and the other guests were drinking from their fancy wine glasses and having a great time. I’m allergic to grapes and can’t drink wine unless it’s sparkling (yes, I just have expensive tastes!!) so, although I had a beer, I felt a bit left out of the communal activity of sharing a drink with friends. I decided to do something about it and asked the team to make a beer that fills the gap that wine left on my dinner table.

We batted about a few ideas for styles – saison was on the list because it can have some Champagne-like qualities, and we thought about doing something with actual Champagne yeast too. I’d also briefed the team that the beer needed to be seriously classy and suggested that we call it Cashmere, which led us to then use the Cashmere hop as the primary flavour. Cashmere has a lemon-citrus note that pulled us towards the Brut IPA style, which is not too bitter and very dry on the finish – just like a dry white wine. 

The resulting beer does exactly what I wanted it to – packaged into a 750ml bottle with a fancy label, it looks good on any table and the beer is up to the job. It’s light and fruity, very pale gold in colour and, at 6.7%, is strong enough to make you want to share a bottle or two with friends.

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We hope you’ve enjoyed these insights into how Beerblefish beers are designed – there may be a part 3 at some point, looking at some of our seasonal specials!

Posted by Bethany in Beer Styles and Recipes, Brewing, Research and Trips
How We Design Our Beers – Part 1

How We Design Our Beers – Part 1

This week we asked you all on twitter and instagram which kinds of beers you wanted to learn about our design process for. The twitter crowd were heavily skewed towards Heritage Ales rather than Contemporary Beers, but the majority wanted a bit of both. On Instagram, we could only give two options (Heritage and Contemporary) and the opposite result came through – that group wanted to know about how we design our Contemporary Beers. As a result of this very unscientific experiment, we’re going with “a bit of both”, but it seems Beerblefish founder, James Atherton, has quite a lot to say on the matter, so we’re splitting this into two parts – a blog mini-series, if you will.

First up, some general stuff about beer design at Beerblefish, and then we’ll dive into the Heritage Ales bit.

Beer design Beerblefish-style

Everyone working at Beerblefish has the chance to design beers – we’ve all got our own tastes and preferences, which means we can produce a wide variety of products and create something for everyone. However, there’s one overriding principle – we don’t make beers that we don’t like!

We also believe that beer should be beer. While we do sometimes add things beyond the basic ingredients that make beer, we would never want to turn it into something that tastes like it isn’t beer. We could get into all sorts of philosophical tangles here about whether something “tastes like beer” if enough people make it and call it beer, but we think you’ll know what we mean if we just say beer should be beer.

All our beers are vegan. This means we don’t add isinglass to our beers, but it also means that we won’t add animal-derived ingredients as flavourings, too. You won’t find honey or lactose in any of our products, for example.

Right, let’s get down to the nitty gritty. How do we actually go about deciding what a beer should be like?

The first thing we do is decide what the beer is for. Drinking, obviously, but in what context? Is it for a long session at the pub or in front of the TV? Is it going to take centre stage at your next dinner party? Or is it perhaps something to savour a small glass of when you only want one?

Then we think about when we’re going to brew it and drink it – as in the time of year, not the time of day. Generally, we (and, it seems, the general public) drink more of the heavier, darker ales in winter and more of the lighter, paler beers in summer, but there are exceptions to this. Mild, for example, is a fantastic drink for a warm day because of its relatively thin body and low bitterness, which is one of the reasons we make our annual mild in May. 

However, one of brewing’s little ironies is that brewing a lager in high summer is virtually impossible without very significant chilling capacity and if you brew a stout in winter, you risk the yeast going to sleep unless you have heating. We’re still really tiny and these facilities that larger breweries might consider basic are currently unattainable luxuries for us.

Designing Heritage Ales

Our Heritage range currently comprises three beers inspired by the nineteenth century. I asked James how he would go about adding a sessionable ale to this range. He said that he would start by looking at the research he’s gathered over the years, including books, research papers, archival records from breweries and online resources such as the fantastic “Shut Up About Barclay Perkins” blog run by historical beer author Ron Pattinson. 

James looks at the research to find out what types of ingredients were used and the proportions they were used in, taking account of the way that malts, hops and yeasts have changed in the intervening period. “If I were to use UK extra pale malt for a heritage ale, it would be too pale – nineteenth century pale ales were much darker than we would expect a modern pale to be.”

The first decision point is whether the beer will be dark or pale, which then determines what the malt bill will look like. “Nine times out of ten, I’d choose Maris Otter as a base malt. I’d love to use heritage malts for the base, but the cost is prohibitively expensive at the moment.” James would usually add a crystal malt for colour and body, and if he’s aiming for a darker beer, he’ll consider adding roasted malts or wheat. He tends not to use inverted sugar – even though it would be authentic to the period, it’s difficult to work with and get the right results from when using the quantities required.

The mash and sparge process usually lasts 90 minutes to two hours – not as long as a nineteenth century brewer would have taken, but longer than a modern beer would require. Beerblefish uses a single infusion sparge from the top – some Victorian breweries would have used European-style decoction mashes or underlet sparges, but these methods would be very difficult (perhaps impossible) on our kit.

The second we’re over the element when transferring from the mash tun to the kettle, we put the elements on.  Directly-fired coppers were common in the 1800s, so the early wort would have got a hint of caramelisation – putting our electric elements on very early allows us to replicate this, and it contributes to the rich body of our Heritage Ales, especially our 1892 IPA. 

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James also adds at least a handful of hops to help stop foaming. He says, “Without modern anti-foam, I think it’s likely that a sensible Victorian brewer would have done this to prevent foaming. They paid duty on the malt used, not the alcohol content like today, so sparge and boil efficiency were key and brewers wouldn’t have wanted to waste vessel space with foam.” 

We always try to use whole-leaf hops for our heritage ales. Our bittering hops always contain a Goldings or Fuggles variety. Our Heritage Ales are not a copy of an 1800s recipe – they are always given a slight modern twist. We often use, for example, Weyermann’s CaraAroma malt in a very small percentage because James likes the slight honey flavour it gives without actually having to add honey to the brew.

The hops used at flame-out will often be modern; just as the brewers in the 1800s used the then-newfangled Fuggles hops, we might add some new US, Australian or New Zealand hops to give the beer our own modern twist.

The boil for a Heritage brew will be at least 60 minutes and we don’t worry if it goes up to 90 minutes. We don’t do the two or three hour boils that the Victorians might have used because we have to get a brew done in a day and our staff aren’t working 16-hour shifts! 

We don’t have a coolship, a common piece of kit in the nineteenth century, so we have to chill through a plate chiller. We’d love a coolship. One day. 

Our fermenting vessels are stainless steel, not wooden. To help simulate nineteenth century wooden vessels, we pitch into primary fermentation a small amount of Brettanomyces claussenii, which is a British strain of brettanomyces. This helps replicate that even with steam sanitation in the 1800s, brewers would have been unlikely to have purged all the brettanomyces from the wooden vessels. James says, “Pitches tended to be mixed fermentation – multiple yeast and bacterial strains. Many British brewers would have used something like the Burton Union system or would have top cropped and pitched yeast into fresh wort. This means you would have an ever-evolving mixture of yeasts and bacteria.” 

At Beerblefish, we use dried and wet yeasts. James will typically design a Heritage Ale with between one and three different saccharomyces strains and Brettanomyces claussenii. We tend to pitch warm (up to 25 degrees Celsius) and then chill the fermenting wort. This method is beneficial to the brettanomyces, which likes to be warm, and it can also add fruity esters from the British ale yeasts that we use. We once pitched British ale yeast in a test batch at 32 degrees Celsius and held it there for two days, which led to a delicious banana flavoured beer!

We’ll normally allow fermentation to run for 10 to 14 days. Fermentation needs to be warm to allow brettanomyces to do its magic. British brettanomyces doesn’t attenuate as completely as some of its Belgian counterparts, so there is a fruity sweetness left in the beer that you wouldn’t get with, for example, a typical gueuze.

James says, “All this may sound like how you make beer, but each of these stages in the process of making beer contributes different flavours to the final beer and the whole process must be considered, not just what’s in the malt, hop and yeast bills.” James reckons that with the same malt, hops and yeast, he could make you many different beers depending on how long you mash for, how long you sparge for, the boil time, the style of elements in the kettle, the times at which the hops are added, the temperature yeast is added at, the temperature of the primary fermentation, whether you give the beer a diacetyl rest…there is an enormous list of variables that contribute to the art and science of designing a Heritage Ale.

Come back next week to find out how we design the beers in our Contemporary range.

Posted by Bethany in Beer Styles and Recipes, Brewing, Research and Trips
Let’s Go Pan Galactic!

Let’s Go Pan Galactic!

We get asked all the time how the brewery got its name – there are two general starting points that enquirers have: “How on earth did you come up with such a weird word?” and, “It’s got something to do with The Hitchhiker’s Guide to the Galaxy, hasn’t it?”

The answer to the first question is long winded and very much off-topic, so I won’t trouble you with it here (maybe one for another day). The answer to the second is, “Not really, but we’d be lying if babelfish sounding a bit like Beerblefish hadn’t influenced our decision to finally go with the name we have, and then in turn influenced some of our beer names.” 

Back in February (or eleventy billion years ago, which is what it feels like now!), I wrote about our Infinite Improbability Saison, which was actually the second of our beers to have a H2G2 name. The first was Pan Galactic Pale Ale, named partly for the gargleblaster of Douglas Adams fame, but also in honour of the Galaxy hops that make up a large part of its hop bill.

Pan Galactic started out as an experiment. Our brewers wanted to try using the same recipe for two beers but treating the water in different ways to see what, if any, difference it made to the final product. Pan Galactic was given its name and the other beer was called Goldfish Pale.

Goldfish was treated very lightly – more or less London’s finest tap water – while Pan Galactic had lactic acid added to the strike water and the sparge water to lower the pH. We also treat our water with magnesium sulphate because the water in our area is low in magnesium, which is needed by the yeast for a healthy fermentation. We use sulphate instead of carbonate or chloride because the water already has a high carbonate level and a fairly high chloride ion level.

When the beers were ready, they were both good, but we each had our own opinion on which was better. So, to decide it, we entered both into the Drinks Business Global Beer Competition in 2018.  

When the results came out, it was close – Goldfish was awarded a bronze and Pan Galactic was awarded a silver, and we decided to keep Pan Galactic in our range. In 2019, it went on to win a one-star award in the Guild of Fine Foods Great Taste Awards.

Pan Galactic Pale Ale has a typical pale malt bill. We use Crisp’s Maris Otter as the base and add a small amount of Weyermann’s CaraAroma for a slight caramel twist. We’ve been through a few variations of the hop bill since the first edition of this ale, but we’re currently using EKG as the bittering hop, with Galaxy and Ella providing the flavour and aroma. Galaxy really is the star of the show here, giving peach, passionfruit and citrus notes to the beer.

The imagery that “Pan Galactic” can conjure up in the mind was grasped upon by our friends at Art By Volume, who created a beautiful representation of the beer as an LP cover. I’ve always wondered what would be on that album!

We’ve had a few blips along the way with this one, as there was a period when it was very difficult to get hold of Galaxy hops, which are really central to both the recipe and the name! We also only very recently settled a two year “discussion” on whether the beer’s name should have a hyphen and/or a space between “Pan” and “Galactic”, as we have written it several different ways over the last couple of years.

We’ve finally settled on “Pan Galactic Pale Ale” and the next stage of its journey is a revamp of the bottle label and pump clip – watch out for those coming soon!

Pan Galactic Pale Ale is currently available in cask (firkin), 5 litre mini casks and 500ml bottles.

Posted by Bethany in Awards, Beer Styles and Recipes, Brewing, Research and Trips
Beer from the Wood

Beer from the Wood

It’s easy to forget that, in beer terms, stainless steel is a relatively recent innovation. Until the mid-twentieth century, wood was the primary material used for beer casks. In the 1960s, the tide turned in favour of first aluminium and then stainless steel.

Enter the Society for the Preservation of Beers from the Wood (SPBW), which was established in 1963 to try to keep up the traditional use of wooden casks. Through social events and support for breweries, pubs and coopers interested in beer from the wood, their work has helped to stop wooden casks from falling completely by the wayside.

While metal casks undoubtedly have their benefits (among other things, they’re lighter and easier to clean), the brewing industry has caught up in recent years with what the SPBW has been trying to tell us – that something was lost from the creative process when the shift was made away from wood.

A constant supply of new hop varieties, different grain combinations and experimentation with yeasts give brewers an enormous playground in which to innovate, but adding back a couple of extra variables – the type of wood used and the length of time the beer spends in contact with that wood – gives an extra dimension that can be exploited in a different way now that brewers have much more control over their processes as a result of technological advances.

Different types of wood can give different flavour profiles, as can any other drink that’s been aged in the vessel before. It’s important to avoid toxic woods, of course – yew and oleander are particularly nasty – but there are plenty of others to choose from and modern coopers make their casks from a range of trees, including hard maple, for its syrupy notes and white ash, which can give a tantalising hint of campfires and marshmallow. However, it’s very noticeable that there aren’t many firs or pines on the list – some people have reported a hint of turpentine in beers aged in conifer wood, so it’s probably best avoided!

In pride of place in the Beerblefish Brewhouse is our French oak wine hogshead that once contained Beaujolais. The first beer we aged in it was a version of our 1853 ESB that we made for a wedding – some of the lees from the wine were still in the barrel and gave the beer a fantastic round mouthfeel and mellow flavour during the six month aging period. The wood is quite old, so there weren’t the vanillins that one might expect from newer oak.

Since then, we’ve aged a few beers in the wooden barrel, most recently our Barrel-Aged Imperial Stout 2019, the latest in our annual series of imperial stouts. We’ve also borrowed some wooden pins and provided the same beer from wooden and stainless steel barrels so that drinkers can spot the differences.

We’re enjoying our beer from the wood so much that we’re about to invest in our own oak casks in preparation for SPBW’s Woodfest 2020 at the Turk’s Head in Twickenham on 28 to 30 May.

Posted by Bethany in Brewing, Research and Trips
Celebrating the Hardest Workers in the Brewery… Yeasts!

Celebrating the Hardest Workers in the Brewery… Yeasts!

Brewers don’t do hard work.

That is not to say brewing is not a physically and mentally demanding job, but our task as brewers is to herd our microbes of choice – and let them do the hardest work in the brewery, munching on sugars to produce the alcohol in our beer. In the video above, Beerblefish owner, James Atherton, shows us how different microbes do this job (while the video is generally accurate, it’s fair to say it might not be entirely serious…)

Most brewers choose to use a single culture of Brewer’s Yeast, often from the Saccharomyces genus, while some making sours will use Lactobacillus and Saccharomyces together; people who are gluttons for punishment, like us at Beerblefish, will use a varied mix of yeasts (and occasionally blends of bacteria). As you can imagine, herding one invisible fungus can be challenging, herding up to five in a single brew requires a little more attention to detail, but that’s what gives our heritage beers their distinctive flavour and character.

Different yeasts produce different flavours, work at different rates and will consume different sugars/dextrins. Saccharomyces will usually start consuming simple glucose before turning their attention to other monosaccharides or longer chain sugars. Lactobacillus will rapidly multiply and chew through glucose, fructose, sucrose, lactose and galactose in that order – but they are not able to metabolise long chain dextrins or starches. Brettanomyces tend to work a little more slowly than brewing strains of Saccharomyces in an aerobic environment then, slow down considerably to about half the metabolic rate in an anaerobic environment.

An interesting thing, if you are herding your microbes, is that placing saccharomyces and lactobacillus in the same environment causes Saccharomyces strains to abandon their usual preferences for simple sugars for more complex sugars. The presence of Lactobacillus in a Saccharomyces culture causes them to rapidly metabolise all the sugars they can pull in. This can lead to more off flavours and is why many brewers these days will kettle sour with Lactobacillus rather than allowing it into primary fermentation.

Posted by Bethany in Brewing, Research and Trips
What’s the difference between lager and IPA?

What’s the difference between lager and IPA?

First, let’s look at the differences you’ll notice when you actually drink them. The amount of hop bitterness is a big differentiator. IPAs are often highly hopped (more than40 IBU and commonly over 60 IBU), whereas lagers are generally far more subtly hopped (around 20-40 IBU). IBUs are international bittering units, a standardised way of quantifying bitterness in beers.

Traditionally Lagers would have used Noble Hops (Saaz, Hallertauer Mittelfrüh, Tettnang, Spalt), whereas an IPA would have used Goldings and Fuggles. Modern IPAs, such as the west coast and east coast styles from the USA are often more bitter than the traditional British variety and use newer hop varieties, including Simcoe, Amarillo, Mosaic and Citra.

These days any beer can use any hop – we have more hops and world trade means we can get some hops from Germany, New Zealand or the USA just as easily as we can from local hop growers, but it is unusual to find a very hoppy, bitter lager or a subtly-hopped IPA.

Now for a science lesson, as we look at the technical differences.

The main difference is the yeast. Ales are typically brewed with a top fermenting yeast, S.Cerevisiae whereas lagers are brewed with a bottom fermenting yeast, S.Pastorianus.As a result of the different yeasts used, ales are fermented at higher temperatures (14-20℃) than lager(10-12℃); the ranges can be larger but these are a rough guide. Some steam lagers are fermented at ale temperatures but with a lager yeast.

A lager would typically be allowed to warm towards the end of the primary fermentation for a couple of days diacetyl rest but this is not always required with an ale. However, if your ale has fermented at the lower end of the yeast’s preferred temperature range, it may benefit from a diacetyl rest.

Lager fermentation usually takes longer than ale fermentation due to the lower temperatures. Steam lagers can finish just as fast as an ale, reaching final gravity in four to five days.

Lagers should, according to their name, be stored for a period of time in secondary/lagering vessels: lager means storehouse or larder. This is not always required and a drinkable lager can be produced in under two weeks, but we would question if it should be called a lager if it has not been stored at 0-4℃ for a week or more.

Now for a short history lesson: how did lagers and IPAs evolve?

Lagers were first made in Bavaria and later in Bohemia (with pilsner) in the early nineteenth century. IPAs started out in London, then production moved to Burton upon Trent. Both these paler varieties of what had gone before were made possible by new indirect kilning methods that allowed for the production of lighter malts.

This little bit of history is important, as lager is usually made with a double or triple decoction mash, whereas IPAs are generally made with the British-style single temperature infusion mash. There are no hard and fast rules though. You could technically make either with either method, and these days many lagers are made with single infusion and, although we’re not aware of any IPAs made with decoction, it can be done. We know a few German brewers who would be horrified to think of a Lager made by British and, therefore, incorrect methods.

Decoction mash versus single temperature infusion mash

There is a very long and complicated explanation for this, but the short answer for our purposes is: in a single temperature infusion mash, the water (liquor is heated to about 75℃ and all the grain (grist) and about a third of the total liquor are mixed together, creating a mash at about 65-67℃. This is then allowed to stand for an hour for the enzymes in the grains to convert the starches in the grain into sugar. You want the lovely sugar as this is what the yeasts will eat and turn into alcohol and other delicious flavour compounds.

The other two thirds of the water are used to shower (sparge) the grain to wash out the remaining sugars.

This method is only possible due to thermometers. Without the ability to accurately measure temperature, single infusion would be highly error prone. The evolution of well-modified, consistently malted barley strains has also helped the reliability of this method.

Decoction mashing, on the other hand, is a far older method, in which you do not need a thermometer. You just need a way to measure time and to boil a mixture of grain and water (the mash). In decoction mashing, grain and water are mixed and then portions of the resulting mash are pulled out of the mash tun, brought to the boil and then returned to the mash tun. This way, even without a thermometer, the malt can be taken through the acid rest, protein rest and saccharification rest consistently – no modern technology needed.

The major downside of double or triple decoction mashing methods, we think, are that they take much longer than single temperature infusion mashes; but the purists would argue they are the one true way to make a lager.

In these enlightened days of brewing, where methods and ingredients travel so easily, the remaining hard and fast differentiator between IPAs and lagers is the different yeasts used to produce them – they are the little ones that do all the work and we brewers just have to keep them warm (or cold) and feed them sugars so they can do the important bit!

Posted by Bethany in Beer Styles and Recipes, Brewing, Research and Trips