1. Preheat oven to 375°F. Line a muffin pan with paper liners.
2. Combine flour, baking soda, and salt in a small bowl. Stir in chocolate chips.
3. Combine sugar, bananas, egg, oil, and vanilla sugar in a medium bowl.
4. Add dry ingredients and mix just until combined.
5. Pour into prepared muffin tin and bake 18-20 minutes or until a toothpick comes out clean. Do not overbake.
6. Cool 5 minutes in the pan before removing and cooling on a baking rack.