Preheat oven to 375°F. Line 16 muffin cups with paper liners. Set aside.
In a large bowl, whisk together the eggs, granulated sugar, vegetable oil, and brown sugar. Add the bananas and vanilla extract; whisk to combine.
Sprinkle baking soda, baking powder, and salt over top. Whisk until well blended.
Stir in the flour, cinnamon, and nutmeg, mixing just until combined. Do not over-mix. Fold in the chocolate chips.
Divide the batter evenly among the prepared muffin cups, filling each cup almost to the top. If desired, sprinkle about ½ teaspoon of coarse sugar and additional chocolate chips on top of each muffin.
Bake the muffins for 20 – 25 minutes, or until a toothpick inserted in a muffin comes out clean.
Transfer to wire racks to cool.