3 oz. French vanilla yogurt (or whatever amount is less than 10 g sugar according to nutrition label)
1 tablespoon natural peanut butter (The brand I buy only has peanuts and sea salt in it.)
1/4 cup milk (I used skim milk.)
2 ice cubes
Peel and cut banana into chunks about the size of ice cubes. Put the banana and all the other ingredients in a blender and blend until smooth and frothy.