"This recipe from Robin Hood flour is one of the company's most requested recipes."
Combine flour, baking powder, baking soda and salt in a mixing bowl. Thoroughly beat together egg, sugar, butter and mashed bananas. Add to dry ingredients. Stir just until moistened. Filled greased muffin cups three quarters full. Bake in a preheated 375F oven 20 to 25 minutes or until top springs back when lightly touched.