Using /u/matthewkocanda 's milkshake base from Reddit, because why reinvent it when it's so good!
My favorite version of PB&J is with grape jelly, not sure why but I always preferred it over strawberry. I also like it loaded with jelly and some thin layers of Peanut Butter. This recipe is pretty high on the % side, but I feel that it does a good job accomplishing what I set it out to be.
INW Grape is pretty weak, and always seems to fade after a decent amount of time, leaving Peanut butter as the main note (when mixed around 3.5/8) So I changed the percents around to (4.5/3.5). Peanut Butter is strong, and higher percentages give a realistic PB taste and mouthfeel, kind of dry, but I really just want the flavor of it here. I may consider bumping PB up by .5% or so. Cookie is to give a bit of a 'bite' to this recipe, like some crumbles on top of the milkshake.
Still working on this, but I can't wait to see what it steeps out as. PB Seems kind of weak as is, but it's definitely tasted in there.
I would give it a few days to a week for the vienna cream to round out, as it always has an odd "soury" taste to me right off the bat.