Preheat the oven: Set it to 350°F (175°C) and grease an 8- or 9-inch loaf pan, or line it with parchment paper.
Mix the dry ingredients: In a large bowl, whisk together the oat flour, cocoa powder, baking powder, salt, and cinnamon.
½ cup oat flour, ½ cup cocoa powder, 1 teaspoon baking powder, ¼ teaspoon salt, ⅓ teaspoon ground cinnamon
Prepare the wet ingredients: In a separate bowl, mash the bananas. Add the eggs, maple syrup, and vanilla extract, and whisk until combined.
1 ½ cup mashed bananas, 2 large eggs, ¼ cup maple syrup, 1 teaspoon vanilla extract
Combine wet and dry: Gradually mix the wet ingredients into the dry ingredients. Stir until just combined; don’t overmix.
Fold in chocolate chips: Gently stir in ¾ cup of chocolate chips.
¾ cup semi-sweet chocolate chips
Transfer to loaf pan: Pour the batter into the prepared pan. Sprinkle additional chocolate chips and rolled oats on top if desired.
¾ cup semi-sweet chocolate chips, rolled oats (optional)
Bake: Bake for 60-65 minutes, or until a toothpick inserted in the center comes out clean. If the top starts to brown too quickly, tent it with foil.
Cool: Let the bread cool in the pan for 10 minutes, then transfer it to a wire rack to cool completely before slicing.