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.
Notes
Recipe adapted from BakingMischief.comYou can double the recipe and use a full egg instead of two egg whites. You can use any sugar you have on hand.You can use any neutral oil like melted and cooled coconut oil, sunflower oil or olive oil ORRRR you can use melted and cooled butter.You can use regular flour or gluten free flour in place of oat flour, one to one. If you don't have oat flour, you can make it with rolled oats processed in your food processor until it resembles a flour consistency.