01 - Preheat oven to 350°F. Line a 12-cup muffin tray with paper liners or lightly grease with cooking spray.
02 - In a large mixing bowl, whisk together mashed bananas, eggs, melted coconut oil or butter, honey or maple syrup, and vanilla extract until fully combined and smooth.
03 - In a separate bowl, stir together rolled oats, flour, baking soda, baking powder, cinnamon, and salt until evenly distributed.
04 - Pour dry ingredients into wet ingredients. Fold gently with a spatula until just combined. The batter should remain slightly lumpy—avoid overmixing to prevent dense muffins.
05 - Gently fold in chopped nuts or chocolate chips if desired, distributing evenly throughout the batter.
06 - Divide batter evenly among the 12 muffin cups, filling each approximately three-quarters full.
07 - Bake for 18 to 22 minutes until tops are golden and a toothpick inserted into the center comes out clean.
08 - Let muffins cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.