01 - Preheat oven to 350°F. Line a 9 x 5 inch loaf pan with parchment paper, ensuring excess paper hangs over sides for easy removal.
02 - In a large mixing bowl, mash bananas thoroughly until smooth. Whisk in eggs, applesauce, maple syrup, and vanilla extract until fully incorporated and creamy.
03 - In a separate medium 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 using a spatula. Mix until just combined—do not overmix as this can create dense texture.
05 - Fold in chopped nuts or dark chocolate chips if desired, distributing evenly throughout batter.
06 - Pour batter into prepared loaf pan. Use spatula to smooth top evenly.
07 - Bake for 45 to 55 minutes until toothpick inserted in center comes out clean. If top browns too quickly, tent loosely with foil after 35 minutes.
08 - Let bread cool in pan for 10 minutes. Using parchment paper, lift out and transfer to wire rack. Cool completely before slicing—about 1 hour.