1 banana (can use frozen to make it icy) 1 heaping Tbs. peanut butter spinach (I fill the blender to the top) protein powder milk (can use soy, almond, rice, or my favorite, COW!) My old workout friends in Mesa swore by this stuff, but they didn't have the PB in it. I think I saw the PB on a Pinterest recipe, and VIOLA! It makes it.