Preheat the oven to 350°F (175°C). Line a muffin tin with parchment liners or lightly grease with butter or oil.
Mash the bananas in a large bowl until mostly smooth.
3 ripe bananas
Add wet ingredients to the bowl: egg, melted butter, honey, maple syrup, vanilla extract, and milk. Stir until combined.
1 egg, 1 tsp vanilla extract, 7 tbsp melted butter, ¼ cup honey, ¼ cup pure maple syrup, ½ cup milk
Sprinkle dry ingredients (cinnamon, baking powder, flour) on top of the wet mixture and stir just until no dry flour remains. Do not overmix.
2 tsp ground cinnamon, 2 cups all-purpose flour, 2 tsp baking powder
Scoop batter into muffin cups, filling each about ¾ full. Optional: sprinkle the tops with a pinch of brown sugar.
Brown sugar for sprinkling
Bake for 20–25 minutes, or until a toothpick inserted in the center comes out clean.
Cool in pan for 5 minutes, then transfer to a wire rack to finish cooling. Serve warm or store for later.