Preheat oven to 350. Spray a bread loaf pan with non-stick. Combine sugar and ground sugar and then coat bread loaf pan in cinnamon sugar.
In a medium sized bowl, sift together the flour, baking soda, salt, and cinnamon and set aside.
Using a mixer or a hand mixer on medium, cream together the butter and brown sugar until light in color. On low, add in eggs one at a time. Then add sour cream and mashed bananas.
Slowly add in dry ingredients to wet until combined on low. Don't over mix. Add in mini chocolate chips
Pour mixture into pan. Add a few extra mini chocolate chips and sprinkle cinnamon sugar on top. Bake for 50-55 minutes. It is done when a toothpick inserted comes out clean. Let rest in the pan for 5 minutes and then put on a cooling rack.