Preheat oven to 350 degrees. Spray a 8 1/2 by 4 1/2 loaf pan with cooking spray. Dust it lightly with flour and set aside.
Whisk the flour, baking soda, cinnamon, and salt together in a small bowl. Set aside.
Mix the bananas, butter, sugar, egg, and vanilla together in a medium bowl. Add in the flour mixture and carefully stir. Don't over mix. Add in the cinnamon chips and gently stir.
In a small dish, mix together the 1/3 cup sugar and 1 Tablespoon of cinnamon.
Add the batter to the loaf pan and smooth out with a spatula. Sprinkle the cinnamon sugar topping generously over the batter.
Bake bread for 50-60 minutes, or until golden brown and toothpick comes out clean. Transfer to cooling rack.
Let bread cool for 1o minutes and then remove from pan. Cool, slice, and enjoy.