01 - Preheat oven to 350°F and line a 12-cup muffin tin with paper liners or grease lightly.
02 - In a large bowl, mash bananas until smooth. Whisk in eggs, Greek yogurt, honey, oil, and vanilla until well combined.
03 - In a separate bowl, whisk together flour, baking soda, baking powder, cinnamon, and salt.
04 - Gradually add dry ingredients to banana mixture and stir until just combined. Do not overmix.
05 - Gently fold in chopped nuts and optional chocolate chips.
06 - Divide batter evenly among muffin cups, filling about 3/4 full.
07 - Bake for 18-22 minutes, or until a toothpick inserted into center comes out clean.
08 - Cool in pan for 5 minutes, then transfer to wire rack to cool completely.