I'm not doing this for nutrition, just goodness in my mouth.
I used two fairly large scoops of store-brand vanilla ice cream (safeway, pretty good), two LARGE spoonfulls of peanutbutter w/ peanuts in it, and 3 large bananas. Add a splash of milk to get the goodness in motion, and blend it into a fine cream. The peanut dust gives it a nice texture.
From the blender, it looks like it was about 30 oz worth of milkshake. But there was probably a lot of air in it from the blending too.