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At the Great American Beer Festival (GABF) this weekend, I saw the future of sours. Among the 3,900 beers on offer, I tasted some 50-plus sours. What I realized after tasting so many so-called sour beers is this category desperately needs further classification.

Nearly every region of the country produces something that could broadly be called “sour beer.” It’s as diverse and varied a category as gin or rum. Now the knowledge gap needs to be filled.

Craft beer lovers have been heralding the rise of sours for years. Back in 2011 The New York Times published a story titled “Brews as Complex as Wine” that declared “over the next year, as American craft breweries bottle the sour beers now resting in barrels, more will begin showing up in bars and stores.” For a certain subset of American consumers in large beer markets, that was true.

For the majority of Americans, however, sour beer remained elusive, something to be cherished and sought after — or to be avoided by those who tasted one sour and thought, “Meh. Not for me.”
Saying, ‘I want a sour beer’ is like if someone asked you what you want for dinner tonight and you said, ‘I want meat,’” Andy Parker, the brewer who runs Avery Brewing Company’s barrel program, says. Parker has been working with Avery for some 15 years, and is referred to alternatively as “Hollywood” (for his personality) and “Chief Barrel Herder” (for his barrel-aged beer passion).

Parker explains that there are wild sours, American sours, goses, gueuzes, fruited sours, and sour brown ales. There are Berliner Weisses and lambics, barrel-aged sours and kettle sours. There are so many types of sours available to consumers that it’s no longer sufficient to just say that you do or don’t like sours, because each one is different.

In general, sours use a strain of yeast called Brettanomyces, or Brett for short. They also have acids and bacteria like Pediococcus and Lactobacillus that create lactic acid, like that of sour milk, and acetic acid, as in vinegar. Many times the bacteria comes from barrels. Sometimes it’s natural from the environment, other times it’s added by the brewer in a controlled environment.

Most obviously, regardless of how it’s made, sours have some degree of acidity.

At the GABF with Parker, I tried Avery’s mouth-watering new Ginger Sour that had, in Parker’s eloquent words, “all the flavors you want to put in your flavor hole.” A few hours later I tasted Wynkoop Brewing Company’s Cucular Proliferation, a gose loaded with cucumber that’s lightly tangy. These two superlative beers were completely different from one another in every way, from taste to acidity level to body. Yet both fall into the general “sour” category.

It’s not really brewers’ faults. With so many styles out there and so many changes in the beer industry, a catchall term like sour allows breweries to market their wares broadly. It’s an invitation to try something unusual — “Hey, here’s something that doesn’t taste like your typical beer. Enjoy!” — without getting mired in details about yeast and bacteria.

“Even brewers don’t know what to call their beer all of the time,” Parker admits.

To better understand the diversity of the sour category, the below explainers provide an entree to each iteration of high-acid beer.
vinepair.com

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