01 - Preheat oven to 350°F. Line a 9 x 5 inch loaf pan with parchment paper.
02 - In a large mixing bowl, mash bananas thoroughly until smooth. Whisk in eggs, applesauce, maple syrup, and vanilla extract until well combined.
03 - In a separate bowl, whisk together oat flour, protein powder, baking soda, baking powder, cinnamon, and salt until evenly distributed.
04 - Gently fold dry ingredients into wet mixture until just combined. Do not overmix—some small lumps are acceptable.
05 - Stir in nuts or chocolate chips if desired.
06 - Transfer batter to prepared loaf pan and smooth the top with a spatula.
07 - Bake for 45-55 minutes until a toothpick inserted in the center comes out clean.
08 - Let cool in pan for 10 minutes, then transfer to wire rack to cool completely before slicing.