Peel the bananas, cut them into irregular pieces, and add them into a bowl. Cover with plastic wrap and transfer the bowl to the freezer for 2 hours.
Put the frozen banana pieces into a blender. Add the rest of the ingredients and beat for 1 minute until there is a smooth and creamy mixture.
Serve into glasses.
Serving Size 1
Servings 4
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.