Mash your bananas and measure out 1 cup. If you don't have enough banana to make 1 cup, you can replace the rest with applesauce, plain yogurt, or sour cream!
In a large mixing bowl, whisk together the melted butter and brown sugar.
Add in the mashed banana, egg, and vanilla and whisk until fully incorporated and smooth. Then stir in the milk.
Next fold in the flour, almond flour, baking powder, baking soda, and salt until just combined.
Then gently fold in the mini chocolate chips.
Spoon the muffin batter into the mini muffin cups so that they're almost full. If desired, press a couple extra mini chocolate chips into the tops.
Bake at 400°F for 12-15 minutes or until a cake tester comes out clean.
Remove from the pan and let the mini banana muffins cool on a wire rack.
Notes
These mini banana chocolate chip muffins will keep in an airtight container at room temperature for up to 3 days.