I brewed a 3 gal batch of Chocolate Peanut Butter Porter.
It required 1.2 oz. cacoa nibs and 1.2 lbs of PB2.
The PB2 was about $18. The PB2 was added at end of boil.
It never really dissolved, and quickly dropped to the bottom of my glass fermenter.
I let the beer sit on it for 2 weeks. I remember it was a mess to clean.
Now 7 months old. I can say it's decent, with a unique taste.
There is PB aroma to the nose, but not a strong PB Chocolate taste.
Don't tell friends its Peanut Butter Cup beer and see if they can guess the flavor.
Definitely a unique novelty, one is enough type of beer.
Personally, I'm glad I brewed the batch, but once is enough.