Preheat your oven to 350°F. Line your muffin tray with liners or spray with coconut oil.
In a medium bowl, mash your banana. Stir in the sugar, egg white and oil and mix until mostly combined. Add in the oat flour, baking powder, baking soda, cinnamon and salt and mix. Fold in the chocolate chips.
Transfer the batter your muffin tray and bake until a toothpick comes out clean about 17 minutes. Allow to cool in the muffin tray for 10 minutes before removing them to the cooling rack.
