The Peanut Butter and Banana One Again, you’ll get around four smoothies out of these quantities. Halve the recipe if you aren’t raising a small army. 4 cups coconut milk, almond milk, or cow’s milk 2 cups baby spinach 3 to 4 frozen bananas (we let bunches go brown every week, peel and halve them, and bag them in the freezer) 1 cup unsweetened plain Greek yogurt (or regular yogurt; Greek is just nice and thick) ½ cup peanut butter 2 tablespoons Nutella Blend the milk and spinach until smooth. Add the bananas and blend.