01 - Preheat the oven to 350°F. Line a 12-cup muffin tray with paper liners or lightly grease it.
02 - In a large bowl, whisk together mashed bananas, eggs, melted coconut oil or butter, honey or maple syrup, and vanilla until smooth.
03 - In another bowl, mix rolled oats, flour, baking soda, baking powder, cinnamon, and salt.
04 - Add dry ingredients to wet ingredients and stir gently until just combined. Do not overmix.
05 - Fold in nuts or chocolate chips if using.
06 - Divide batter evenly among the muffin cups, filling each about 3/4 full.
07 - Bake for 18-22 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
08 - Cool in the pan for 5 minutes, then transfer muffins to a wire rack to cool completely.