Preheat your oven to 350°F.
In a large bowl, mix together the oats, protein powder, and baking powder.
In a separate bowl, add the bananas and butter. Microwave them for a bit to soften and mash until they are smooth.
Whisk together the mashed banana and butter, egg whites, honey, milk, and 5 tbsp of the powdered peanut butter. Pour in the dry ingredients and 2 tbsp of the chocolate chips. Mix to combine.
Spray a 13"x9" pan with oil and add the oat mixture. Top with the remaining chocolate chips.
Bake for 30-35 minutes.
Mix the remaining peanut butter with water and drizzle it over the top of the baked oatmeal.
