Preheat your oven to 350 degrees and prepare a muffin tin with liners or nonstick spray.

Mix sugar and melted butter in a large bowl until well combined.

Add mashed bananas and eggs to the mixture and stir well.

Stir in flour, baking soda, vanilla extract, and salt until just combined.

Fold in chocolate chips and walnuts (if using).

Divide batter evenly into the prepared muffin tin.

Bake for 18-20 minutes, or until a toothpick inserted in the center comes out clean.

Allow muffins to cool for a few minutes before removing from the tin.

Serve warm or at room temperature and enjoy!