If you’ve been paying attention to the Alberta beer scene lately, you might have noticed a “new” style of beer creeping its way into popularity—Sour Beers. In Calgary, Dandy Brewinghas a sour for every season and Wild Rose Brewery has the Cowbell Kettle Sour. In Edmonton, Situation Brewing has the WTF Blood Orange. And in Lacombe, Blindman Brewing has a range of kettle sours as well as barrel-aged sours. They’re distinct, fruity beers with a unique tartness—but what exactly goes into making a sour beer?