Step 1

Preheat oven to 350 degrees F. Line large baking sheet with unbleached parchment paper or silicone baking mat, and spray with cooking spray.

Step 2

In a medium bowl, mash bananas with a fork. Add whey protein powder, oats and peanut butter; stir well to combine (batter's consistency will be runny). Add chocolate chips and give a few more stirs.

Step 3

Spoon mixture onto prepared baking sheet (cookies don't spread, so shape them now) and bake for 12-14 minutes (depending on size). Cool on a cooling rack for 5 minutes.