Prepare the Batter
Preheat the oven to 180°C (350°F) and line a muffin tin with paper liners or lightly grease it.
In a bowl, mash the bananas until smooth.
Add eggs, milk, vanilla extract, and melted coconut oil, mixing until combined.
Stir in the oats, baking powder, baking soda, cinnamon, and salt. Mix until well incorporated.
Fold in optional add-ins like chopped nuts or dark chocolate chips.
Bake the Muffins
Spoon the batter evenly into the muffin cups, filling each about ¾ full.
Bake for 18-22 minutes, or until a toothpick inserted in the center comes out clean.
Allow the muffins to cool in the pan for 5 minutes, then transfer them to a wire rack to cool completely.
Serve and Store
Enjoy warm or store in an airtight container at room temperature for up to 3 days.
For longer storage, refrigerate for up to a week or freeze for up to 3 months.