This healthy peanut butter smoothie can be made with, or without protein powder. You get to choose.If you do add protein powder to this smoothie with peanut butter and banana, it will increase the protein by an additional 21 grams. So I reccomend adding it in!Try this banana peanut butter protein shake for breakfast, as a snack or dessert. Or add in the protein powder and enjoy this healthy peanut butter banana smoothie as a meal replacement. How to Freeze Bananas: Peel and slice bananas…