So I am trying to gather as much information on this topic as possible. I typically stick to standard styles but every now and then like throwing some spice in my holiday beers or some chocolate or coffee or whatever in my stouts and such.
My question is this... How do you all go about adding these spices and flavoring agents in a sanitary way? I have tossed cinnamon and nutmeg in my winter warmer and gotten gushers. I have put vanilla and coffee in my stout and gotten something that tastes like vinegar.
The standard beers I do, IPAs and Reds and such, seem to be fine. It is only when I go to add flavoring agents that I seem to infect the hell out of my beer.
So... what do you do? How do you do? Let's get a nice list of best practices. Coffee, vanilla, spices, fruit, chocolate and whatever else you have added successfully... let me have it.