Preheat the oven to 350 degrees. Coat a small loaf pan with cooking spray.
Mix the mashed bananas, butter, sugar, egg, and vanilla together with a beater until creamy.
Combine the flour, baking soda, cinnamon, cloves, nutmeg, and salt together in a separate bowl then mix well. Gently add the flour mixture into the banana mixture until just combined. Don't over mix.
Mix together the 1/3 cup sugar and 1 tablespoon of cinnamon.
Add half of the batter to the loaf pan and then sprinkle more than half of the cinnamon-sugar mixture all over the batter in the pan. Add the rest of the batter, and then sprinkle the leftover cinnamon-sugar on top.
Bake for 55-65 minutes, or until a tester inserted into the center comes out clean. Remove from the oven then let it cool for a few minutes before transferring to a cooling rack to finish cooling. Slice and serve with butter if desired. Enjoy.