Preheat oven to 375 degrees.

Dry Ingredients: Add oats to a food process or blender and blend until it's the texture of fine flour. Add to a mixing bowl. Stir in protein powder, white whole wheat flour, baking soda, baking powder, salt, and cinnamon.

Wet Ingredients: Mash bananas in a separate bowl. Mix in egg, Greek yogurt, vanilla, and maple syrup. Gently fold in dry ingredients.

Bake: Pour into a greased or lined standard 12-cup muffin pan. Bake at 375 degrees F for 5 minutes, then reduce heat to 350°F and bake for 10-15 more minutes, or until a toothpick inserted in the center comes out clean.