While the bananas are cooling, butter and flour a loaf pan and set aside. Also, make the crumb topping so you can refrigerate it while you make the banana bread. To make the topping:Combine 4 1/2 tablespoons of sugar, 4 1/2 tablespoons of flour, and 1 1/2 tsp. of cinnamon in medium bowl. Add the cut up butter and with your hands, squeeze all ingredients together until the mixture looks like wet sand. Put in fridge to chill while you make the banana bread.