Currently I have 2 carboys in primary filled with a porter I've been working on. One is going the bourbon/vanilla route with oak cubes being used as well. But with my other I was thinking of adding a brandy of some sort, maybe a blackberry brandy into the secondary to see what type of results could be had.
My question is has anyone attempted this before and if yes how did it turn out? I'm thinking it'll give the porter some subtle notes and if combined with the fruitiness found in the flavored brandies maybe some dark fruit as well.
I appreciate any help with this in advance. I may just go for it in the tradition of the hobby and see what happens.