But if you like Belgian lambics, warm ales and the tang of kettle-fermented sours, you might be the intended audience for the German beer style known ... in a crisp, clear brew.

At its most basic, kölsch is a German beers that's like a mash-up of an ale and lager. It's made with ale yeast but, like a lager, it's top-fermented—meaning yeast accumulates on the top of the ...