Preheat your oven to 350°F (175°C) and line a muffin pan with paper liners.
In a large bowl, whisk together flour, oats, sugar, baking powder, and baking soda.
Stir in the chocolate chips.
In another bowl, mix mashed bananas, eggs, applesauce, and milk.
Pour wet ingredients into the dry ingredients and mix until just combined.
Divide the batter evenly into the muffin cups (about ¾ full).
Bake for 18–22 minutes or until a toothpick comes out clean.
Let them cool in the pan for 5 minutes, then transfer to a cooling rack.