Preheat the oven to 350 degrees.
Line your muffin tins with cupcake liners or coat with nonstick spray.
Whisk together the flour, baking soda, and salt in a medium mixing bowl.
In another mixing bowl combine the butter, eggs, sugar, vanilla and mashed bananas together.
Gently stir the butter mixture into the flour mixture, stir just until combined.
Fold the nuts and chocolate chips into the muffin mix.
Fill your muffin tins so they are 3/4 of the way full.
Bake for 24-26 minutes, until a toothpick, comes out clean from the center.
Place on a cooling rack to cool and store in an airtight container.