Peanut Butter: I used peanut butter that had salt. If your peanut butter doesn't, you may need to add a pinch to the mixture. Also, if your peanut butter has a looser texture, start with 3 tablespoons of peanut butter and add more as long as the mixture isn't too soft.
Instructions for popping quinoa (and other pseudo grains) can be found here.
Recipe adapted from Edible Perspective + A Couple Cooks