Preheat oven to 350oF. Line up a muffin tin with cupcake liners.
In the mixing bowl, sift flour, baking soda, and salt. Sifting dry ingredients will help to avoid clumps. Set aside.
In a large bowl, add white granulated sugar and brown sugar. Add melted butter. Using a hand or electric mixer, combine butter and sugars on medium speed.
Continue mixing, add eggs, one at a time. Add vanilla extract.
In a separate mixing bowl, mash up four ripe bananas (medium-sized). Then, add them to the muffin batter.
Add dry ingredients and mix until all combine.
Using a spatula, fold in the chocolate chips.
Fill cupcake liners. You can use an ice cream scoop or a regular spoon to help.
Top the muffins with extra chocolate chips. This is optional.
Bake muffins at 350oF for 20-24 minutes.
Notes
Get all ingredients and tools ready before baking. Measure all ingredients using a kitchen scale. Do not overtake muffins.