Preheat your oven to 350 F.
In a large bowl, whisk together the mashed bananas, eggs, milk, maple syrup, and oil.
In a separate bowl, combine the almond flour, oat flour, cocoa powder, baking soda and salt.
Fold the dry ingredients into the wet and whisk together until smooth. Add in your chocolate chips, reserving some for the top of the muffins.
Line a large muffin tin with paper liners or grease with cooking spray and pour about 1/3 cup of batter into each cup- you should get around 16 muffins.
Top each muffin with a few more chocolate chips, and bake for 25 minutes, or until the top is firm to touch and a toothpick comes out clean.
Keep refrigerated in an airtight container for up to 1 week.
Extras can be frozen for up to 3 months.