Preheat your oven to 350°F (175°C). Prepare a 9-inch (or 8-inch) loaf pan by greasing it with oil or butter, or lining it with parchment paper.
Mash the bananas using a fork or a potato masher until smooth. Add the eggs, maple syrup, vanilla extract, and milk. Mix everything together until well combined.
Next, blend rolled oats in a blender until they turn into a fine oat flour. Add the chocolate chips into the oat flour.
Add the oat flour, baking powder, baking soda, a pinch of salt, and cinnamon into the banana mixture. Mix everything until the dry ingredients are fully incorporated with the wet ingredients.
Pour the batter into the prepared loaf pan. Top with a few extra chocolate chips and oats for a nice finish.
Bake for 40-44 minutes, or until a toothpick inserted into the center comes out clean. Let the bread cool in the pan for a few minutes before transferring it to a cooling rack. Allow it to cool completely before slicing and enjoying!