Preheat oven to 350°F (180°C) and line a loaf pan with parchment or spray with cooking spray. See the video to learn the easiest way to line a loaf pan.
In a large mixing bowl, combine the dry ingredients: oat flour, almond flour, protein powder, coconut sugar, baking soda, baking powder and cinnamon.
Whisk together the wet ingredients in a separate mixing bowl; Greek yogurt, mashed bananas, vanilla extract, egg, and egg whites.
Pour the dry ingredients into the wet ingredients and stir until just combined. Fold in chocolate chips.
Pour the batter into prepared loaf pan. Sprinkle with additional chocolate chips.
Bake for 35-45 minutes, or until a toothpick inserted into the center comes out mostly clean. Check at 25 minutes and cover with tin foil to help the top from browning too much.
