I thought about adding whisky/bourbon/rum/brandy to one of my future porters or stouts. I was thinking about evaporating the alcohol from it first in order to prevent unnecessary ABV increase via heating the spirit to 80C for approx. 2 hours. I have a few doubts regarding this.
Does it even make sense to do so? Will the spirit's taste and aroma be noticeable?
If so, how much should I add? I was thinking somewhere between 0,25 and 0,5 litre for a 10 litre batch, but that's just a wild guess based on zero information from anyone.
If anyone has tried doing that, I'd be grateful for any insight.