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 hand or electric mixer, combine together butter and sugars on medium speed.
Continue mixing, add eggs, one at the time. Add vanilla extract.
In a separate mixing bowl, mash up 4 ripe bananas (medium sized). Then add them to the muffin batter.
Add dry ingredients and mix until all combine.
Using spatula, fold in chocolate chips.
Fill cupcake liners. You can use ice cream scoop or regular spoon to help.
Top the muffins with extra chocolate chips. This is totally optional.
Bake muffins at 350oF for 20-24 minutes.