In a medium bowl, combine the sugar, oil, sour cream, eggs, baking soda, bananas, and flour.
Sprinkle a small amount of the cinnamon/sugar mixture onto the bottom(s) of the greased pan(s).
Pour batter into prepared pans about 1/2 way full.
Sprinkle additional cinnamon/sugar mixture on top of batter.
Pour remaining batter into each pan, filling about 3/4 full.
Sprinkle remaining cinnamon/sugar evenly on top of each pan.
Place pan(s) into preheated oven to bake for about 30 minutes if mini loaves, or 60 minutes if large loaf. Use a toothpick inserted in the center to ensure its baked through. The toothpick should come out clean.
Once baked, remove from oven and allow to cool 5-10 minutes before serving!