Peanut Butter and Banana Smoothie Posted on February 6, 2015 by print recipe | Add to my recipe box Serves 1 1 ripe banana, quartered and frozen 1/2 cup nonfat milk 1/4 cup plain nonfat yogurt 1-1/2 tablespoons creamy, natural, peanut butter Put all of the ingredients into a blender and blend until smooth.