Since you can add coffee pretty much anywhere in the process, I did a few experiments with straight out coffee grounds in the mash with some mixed results. The only constant that I noticed is that the beers didn't age all that well but tasted great in the first month or two. I found in a 5 gallon batch of porter, 3-4 oz of grounds gave a nice distinct flavor.
I'm going to be doing the next batch by adding cold-steep (grounds, cold water, leave it in the fridge for 24-48 hours and filter the grounds) straight into the primary. I'm also thinking about stepping it up to a 10 gallon batch, and adding cold-steep to the primary on 5 and 'dry-hopping' the other with an equal amount of cold-steep a few days (my house strain usually hits terminal in 36 hours - 3 days) later to compare the effect of the yeast on the coffee.

BN Army // 13th Mountain Division 


