During San Diego Beer Week last November, I had a chance to try Karl Strauss' Peanut Butter Cup Porter and was amazed at how much peanut butter flavor came through in the final product. They used powdered peanut butter when making it, which keeps undesirable oil out of the beer without compromising the peanut butter flavor. They also incorporated cocoa nibs into the brew, the rawest and strongest form of chocolate flavoring. I decided to try the same thing on a homebrew scale, using PB2 and also including cocoa nibs. The addition of coffee would add another (hopefully desirable) element to an already complexly flavored beer. All three flavors should make for something pretty ridiculously decadent-more calories than any reasonable person needs to consume at any one time-so I named it The Lurker because it should stay with you for a while, no matter how much Insanity you do.
Karl Strauss' version was a Brown Porter. I decided to brew a Robust Porter and came up with the following recipe:
I brewed 7.5 gallons last Wednesday. I mashed at 152 degrees F for an hour and had a rolling 60 minute boil. The lactose was added with about 20 minutes left in the boil and should contribute some sweetness and body. Two gallons were used to make Dregs beers (DREGS #9 and DREGS #10), and the other 5.5 gallons was innoculated with 500 ml of WLP007 Dry English Ale Yeast and placed lovingly in the fermentation chamber. I'll be adding the cocoa nibs and PB2/PB2-Chocolate in secondary in two separate additions, allowing at least a week (maybe more) of contact time for both. I anticipate a restarting of fermentation with the addition of the PB2. I'm not sure how many gravity points two pounds of PB2 will contribute, but the final beer should be pretty big. The original gravity after chilling was 1.058.
As for the coffee, I want it to take a prominent role in the flavor, but not be overly bitter. I'm going to cold press decaffeinated French Roast coffee (not sure what brand yet) and add sixteen ounces to the bucket at bottling. I'm hoping that the coffee flavor will shine in the final beer.