Prep your pan and oven: Heat the oven to 350°F (175°C). Line a 12-cup muffin tin with paper liners or lightly grease with oil.
Mash the bananas: In a large bowl, mash the ripe bananas with a fork until mostly smooth with a few small lumps.
Whisk in wet ingredients: Add eggs, maple syrup or honey, Greek yogurt, oil, and vanilla.
Whisk until well combined but not frothy.
Combine dry ingredients: In a separate bowl, whisk flour, baking soda, baking powder, salt, and cinnamon. This prevents clumps and ensures even rise.
Fold together: Add the dry mixture to the wet. Use a spatula to fold until just combined.
Avoid overmixing; a few streaks of flour are okay.
Stir in mix-ins: Fold in nuts or chocolate chips if using. Keep the batter thick but scoopable.
Fill the cups: Divide batter evenly among the 12 muffin cups, filling each about 3/4 full for a nice dome.
Bake: Bake for 16–20 minutes, or until a toothpick inserted in the center comes out clean or with a few moist crumbs.
Cool: Let muffins cool in the pan for 5 minutes, then move to a wire rack to cool completely. This helps set the crumb and prevents sogginess.
Serve: Enjoy warm or at room temperature.
They’re great plain or with a swipe of nut butter.