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 andWild Rose Breweryhas the Cowbell Kettle Sour. In Edmonton,Situation Brewinghas the WTF Blood Orange. And in Lacombe,Blindman Brewinghas 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?