Preheat the oven to 350°F and line a muffin pan with liners.
In a large bowl, mash the bananas, then whisk in the eggs, avocado oil, maple syrup, and vanilla until smooth.
In a separate bowl, whisk together the oat flour, cocoa powder, baking soda, and salt.
Gradually add the dry ingredients to the wet ingredients, stirring until just combined. Fold in the chocolate chips.
Divide the batter evenly among the muffin liners.
Bake for 18-22 minutes, or until a toothpick inserted in the center comes out clean.
Allow to cool before serving. Enjoy!