It's kind of funny you'd mention turning tea into ale in the IC. I've got one of those pre-packaged brewing kits (a gift), one of the first things I did with it was turn a batch of Sweet Tea into beer.
It was glorious. Absolutely inspired; one of the best ideas I've had in a very long time. Two gallons of moderate to strong, bitter and sweet, textured brown ale; the flavor was everything I remember from the culture of my upbringing - but with booze. The alcohol was smooth to hit and smooth to leave, blending organically with the black tea and notes of brown sugar, with just the right amount of carbonation. It was art. It was science mixed with a religious experience.
Problem being, Keystone doesn't have a home brewing kit. It'd be simple enough to make one with things found in the marketplace, provided he wouldn't also want to distill. If you'd be willing to cover that under a Cooking Proficiency, I'm up for it. Sadly though, I must recognize the fact that I know things my character does not, and vice versa. More's the pity.