Preheat oven to 350°F

Using nonstick spray, oil, or butter, grease a 9x6 loaf pan.

Mash 3-4 very ripe bananas in a large mixing bowl

To the banana bowl add the cake mix, the melted butter, eggs, vanilla, salt and cinnamon. Using an electric mixer, whisk together until well combined.

Fold in chocolate chips (if using)

Pour into the greased loaf pan and bake for 40-50 minutes. (Ours took 50 minutes). If it starts browning too fast on top after 30 minutes of cooking, loosely cover it with foil for the rest of the baking time

Let cool in the pan for 20 minutes before slicing and enjoying.