Preheat oven to 350°F (175°C) and line a muffin tin with liners.
Mix bananas, Greek yogurt, honey, egg, vanilla, and cinnamon until smooth.
Stir in oat flour, rolled oats, chocolate chips, baking powder, and salt until combined.
Divide the batter evenly into the muffin cups.
Bake for 18–22 minutes until the tops are lightly golden and the chocolate chips remain melty.
Cool slightly before serving.
