5.0% ABV Oatmeal Stout. If you only try one dark beer in your life try a Buffalo Sweat. It will change your entire perception of what a dark beer tastes like. The secret is in the sugar. We brew it with a cream sugar. This regains the beer's sweetness through the brewing process, and also gives it a smoothness that is hard to describe. These characteristics balance out the copious quantities of roasted barley used in the brewing process to create a rich, complex and delicious beer.