1: Preheat the oven to 350°F.
2: Mash the bananas and mix with egg whites and the whole egg.
3: Add the oatmeal, protein powder, cocoa, baking powder, and peanut butter to the mixture.
4: Stir until well combined.
5: Pour the mixture into a baking dish.
6: Bake for 20-25 minutes.
7: Let cool, then cut into squares and serve.