Grease your loaf pan with butter and line with parchment paper. Set aside. Position your oven rack to the middle and pre-heat to 350 F.
Add bananas, cottage cheese, and eggs to your blender. Blend until completely smooth, about 15-20 seconds.
Transfer the blended banana mixture to a large mixing bowl. Add melted and cooled butter, vanilla extract, and sugar. Whisk until smooth.
In a separate medium bowl, whisk together flours, baking soda, salt, and cinnamon.
Add dry ingredients to wet ingredients. Using a wooden spoon or spatula, mix until just combined. Gently fold in chocolate chips if desired, reserving 2-3 Tbsp.
Pour your batter into the prepared loaf pan. If needed, gently spread the batter to reach the edges of the pan with a spatula. Sprinkle with remaining chocolate chips.
Bake for 45-55 minutes, or until the cottage cheese banana bread is golden brown and completely set. A toothpick placed into the center of the bread should come out mostly clean, with a few moist crumbs.
Allow banana bread to completely cool in the pan before removing and slicing.
Nutrition facts calculated with chocolate chips.
Calories: 278kcal, Carbohydrates: 40g, Protein: 6g, Fat: 11g, Saturated Fat: 6g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 2g, Trans Fat: 0.3g, Cholesterol: 51mg, Sodium: 367mg, Potassium: 237mg, Fiber: 3g, Sugar: 20g, Vitamin A: 289IU, Vitamin C: 3mg, Calcium: 33mg, Iron: 1mg