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I chose a flight of Porters using 4 different strains of yeast. Unbelievable how differently they tasted: one like a traditional Porter; one a bit sweet; another almost sour. Only difference - the yeast.
They were also serving one of the most unique beers that I've ever seen - FrankenStout. Here is the description from a press release announcing the beers release.
Frankenstout answers the burning question, “What would happen if we pitched 96 yeast strains into one beer?” The answer is, well, complex. Each strain struggles for dominance, with twists and turns in every sip. The beer pours black with a thick brown head. Robust coffee and dark chocolate aromas and flavors abound. Belgian yeast strains are evident through spicy and clove like notes. The beer finishes with a strong cherry oak finish.