Fluff is pretty impossible to measure, so this doesn’t have to be an exact amount, just kind of eyeball it. As long as you have enough to cover the PB cups, you’re good to go.
I put chocolate chips on top for extra goodness:)

ready in about an hour and 10 minutes; serves 16
You might need to buy:
  • packed brown sugar
  • sugar
  • egg
  • vanilla
  • flour
  • baking powder
  • salt
  • graham cracker crumbs
  • marshmallow fluff*