Preheat the oven to 325 degrees. Grease a 9x5-inch loaf pan.

Mix bananas, sugar, egg, semi-sweet chocolate chips and butter together in a bowl.

Mix flour and baking soda together in a separate bowl; stir into banana mixture. Stir in salt; pour batter into the prepared loaf pan.

Bake in the preheated oven until a toothpick inserted in the center of the bread comes out clean, about 1 hour.