Preheat the oven to 375. Spray your muffin tin with cooking spray or line with paper liners.
In your mixing bowl combine the flour, sugar and baking soda.
In a separate bowl, mash the bananas and add in the eggs, oil and vanilla. Combine all ingredients into the large mixing bowl and stir.
Fold in a 1/3 cup of chocolate chips or your preferred add-in.
Fill each muffin tin 3/4 of the way full.
Bake at 375 for 15-20 min, until a toothpick inserted into the middle of a muffin comes out clean. Cooking time will vary depending on the type of muffin tin used.
Allow muffins to cool for 5 minutes and then remove from muffin to finish cooling completely.
Notes
These muffins can be stored on the counter in an air tight container for 3-4 days. If you would like to freeze them, allow to cool completely and place in an air tight container in the freezer for up to 3 months.