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How brewers are churning out tangy sours without the hefty price tag

Breakside Brewery in Portland, Ore., churns out kettle-soured beers that it sells for just $6 a bottle. Brewmaster Ben Edmunds says he uses kettle sours as an acidic blending ingredient to add to other beers. 

Sour beers are made by deliberately adding microbes to create complex brews, but that process take a lot of time and money. Until now.