Heat oven to 375°F. Line regular sized muffin tins with paper baking cups. Spray a bit of cooking spray over the liners (this prevents the muffins from sticking to the liners.)
In a bowl, combine the sugar, oil and eggs with a hand mixer. Add in mashed bananas and vanilla.
Combine the dry ingredients (flour, baking soda, cinnamon, salt) into a medium bowl. Add mixture to wet mix a little at a time.
Once wet and dry ingredients are combined fold in chocolate chips.
Then, divide batter evenly among muffin cups. Using a large cupcake scoop makes it easy!
Mix together the cinnamon and sugar set aside (1/2 tsp of each.) Sprinkle mixture over the top of each of the muffins.
Bake 17 to 21 minutes or until toothpick inserted in center comes out clean.
Immediately remove from pan to cooling rack. Let cool before diving in.