1 (16-ounce) box brownie mix (I have also made this gluten-free using used ALDI liveGfree brownie mix)
Instructions
Preheat oven to 325 degrees F. Coat just the bottom of a 9-inch loaf pan with cooking spray.
Mash bananas well with a fork. Add eggs and oil; beat with an electric mixer until combined. Add brownie mix and mix until smooth. Spoon batter into prepared pan.
Bake for 1 hour and 15 minutes or until wooden pick inserted in center comes out clean. Let cool in pan 10 minutes. Remove from pan and cool on wire rack.