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On the kegerator website, I found this method to make a "cheat lager":

To brew a great “hybrid” lager, I’d recommend using one of the following yeast strains: White Labs WLP001, Wyeast 1056 or SafAle US-05. It’s also important to ferment as cool as you can within the range of the yeast you choose. However, don’t get too cold, as you’ll drop your yeast out of suspension and stall your fermentation.

Once the fermentation is complete, rack or bottle it and then refrigerate it. It will continue to “lager” in its packaging, mellowing out some of the flavors. If done well, the average beer drinker will not be able to tell the difference between this beer and a proper lager.

Does this sound reasonable? It's certainly much easier than a standard lager method.

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    There are hybrid styles that aren't modern inventions. For example a German Altbiers and Kolschs use traditionally ale yeasts but then have a lagering phase. – winwaed Jun 24 '19 at 13:51
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To the purist, a lager should be brewed with a S. Pastorianus strain of yeast and an ale with S. Cerevisiae strain of yeast. The former ("lager yeast") works at far lower temperatures than the latter "ale yeast") does.

That said, the first lagers (in Bohemia in the 1500's or so) were brewed with whatever yeast happened to end up in the beer. Nobody knew what yeast was in those days, or even that it existed. The term "lager" (as has already been mentioned in responses above) refers to the German word for "storage" (Lagerung) and stems from the fact that this beer style was brewed seasonally, then packaged in sturdy wooden barrels that were stored deep in the cool caves occurring in the region for months on end. During this lengthy maturation the beer fermented out further, cleared, and became somewhat carbonated, which eventually led to beer (esp. later) as we know it today. Until then, beers were brown, murky, flat concoctions served at room temperature.

While using an ale yeast for a later is a vile abomination to the purist, the truth is that quite a significant portion of the micro-brewed beers in the world sold as lagers are in fact fermented with S. Cerevisiae, but using a variety suitable for lower temperatures, in order to obtain a more neutral and "cleaner" flavor profile. Lallemand's Nottingham Ale Yeast (no rebranded to High Performance Ale Yeast) is a good example: at room temperature it's a typical ale yeast giving you a measure of fruity flavors that work well in ales, but at the lowest end it of its wide temperature range (about 10C / 50F or even little lower) and a proper diacetyl rest, it will produce a beer with a flavor profile generally indistinguishable from lagers fermented with a "real" lager yeast.

So the only real question, as I see it, is whether you want a beer that tastes, smells, looks and drinks like a lager and has all the vital characteristics or a lager, or instead you want to make a big think about the pedigree of the yeast you used to brew it. Your choice. :-)

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I don't find WLP001, Wyeast 1056 or SafAle US-05 to be as clean and lager-like as many people claim. They give a slight peach and/or circus peanut ester even at cold temperatures. Instead I would recommend Wyeast 1007, 2565, or WLP029 altbier or Kolsch-style yeasts for extremely clean lager-like ales.

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If you call your beer a lager and it's fermented with ale yeast, I firmly believe that it's a blatant lie. In a homebrew setting, who cares, if you're the only one drinking it? As a brewery owner and brewer, I've had many conversations with other owner/brewers that agree. We had a local brewery making nothing but "German Lager" beer and come to find out every thing they made was fermented with US-05. They are were the laugh of the town for a while until they made some changes. My two cents, if you slap a label on a beer that says "lager" and you fermented with an Ale Yeast, you're lying and it's ugly. They are essentially different species of yeast. Saccharomyces pastorianus (or S. carlsbergensis) is your lager strains and Saccharomyces cerevisiae for your ales. It's the same faux pas some make (even more often) by calling their beer a Kolsch and not fermenting with a Kolsch strain and instead using US-05 or something; and if you want to get real technical, should be brewed in Koln, Germany (Americans use the name "Kolsch Style" if they are respectable). Is it a hefeweizen if you ferment with US-05? No. It's only a hefeweizen if brewed with a hefe strain. To sum up, use the right yeast and call your beer what it is.

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  • I think taste is bottom line, not species or process. If it tastes like a lager, then it is a lager, or at least a Kolsch or alt, if it's near the Kolsch or alt style parameters. HOWEVER...... as I've said before in other responses, I really don't think it's so easy to pull off a lager using an ale yeast. I'm sure it would be much easier for an ale to pass through the eye of a needle than to be considered a truly lager-like beer. Same for a hefeweizen to be brewed with a non hefe yeast unless maybe it's a clovy Belgian strain maybe you could pull it off. – dmtaylor Jun 26 '19 at 0:27
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Technically, a lager should be called a "lager" if it's made from lager yeast and lagered like traditional methods. In reality, you can use Safale US-05 at cool temperatures and extended cold aging and 95% of people wouldn't be able to tell the difference between a traditional lager and an ale fermented at cool temperatures.

Just call it whatever you want because that's what I see at many local breweries around me.

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If possible on your rig, you could ferment under a bit of pressure. Increased pressure can inhibit ester formation to some extent.

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"to lager" is a process, cold storage conditioning for extended time, usually uncarbed and bulk storage... but the key is cold conditioning to get the effect.

to make a lager, you use lager yeast....but its a homebrew, we can call it whatever we want.

TO fully answer your question, Yes you can lager ale, you can lager beer made with any yeast you want, because you are cold conditioning it to make a crisp clear beer.

one thing to be aware of is, if you bulk lager, and then bottle carbonate...you may need to add extra yeast or give it extra time to carbonate.

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You can make great tasting beer with any method that works.

Can you ferment California Ale yeast at low temps and make great tasting beer? Yes.
Can you not make a lager and call it a lager? Thats up to you.

But can you make spaghetti and meatballs with ziti? No.
If it tasted great I'd still ask for more.

But it's homebrewing you get to do whatever you want.

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  • I really want to know whether this will really produce a result such that "the average beer drinker will not be able to tell the difference between this beer and a lager", not just whether it will be good. I guess the best is just to try it and see. – user2132672 Jun 24 '19 at 13:08
  • The average beer drinker??? probably not tell the difference. Maybe done side by side with a true lager yeast strain. But as a solo sample; likely no. – brewchez Jun 25 '19 at 1:40
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    I think I would be able to taste the difference. These yeasts do produce some esters even at low temperatures. See my other answer for more details. – dmtaylor Jun 25 '19 at 3:58
  • This doesn't really answer the question, does it? – chthon Jun 25 '19 at 10:16
  • dmtaylor I suppose we need a definition of average beer drinker. I wouldn't classify someone who homebrews the average beer drinker. I know that I could probably taste the difference as well. – brewchez Jun 25 '19 at 11:43

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