Ya, +1 for Caioz1jp, when I plugged it into Beersmith it's closest match is American Stout.
I mixed my PB2 and cocoa powder in vodka to kill off any yeast or bacteria first and then added it to the mix. I think I won't do it that way again. It would have taken WAY too much vodka as that PB2 turns to a thick unwieldy paste and I still had to stir it in by hand.
Next time I think that I'll dissolve it in water, boil it, let it cool and then add it. If anyone has found a successful way to mix it in smoothly, I'd love to hear it!