Preheat oven to 350 degrees, and line or spray 2 small bread loaf pans.
In a large bowl, smash the bananas with a fork.
Add the cake mix and eggs, and mix well.
Evenly distribute the cake batter into the prepared loaf pans. Top with chocolate chips if you are using them.
Bake at 350 degrees for 25-35 minutes, or until a toothpick comes out clean.