In a large bowl, combine flour, sugar, baking soda and salt.
In a separate small bowl, beat eggs, then stir in mashed bananas.
Add the banana mixture to the flour mixture and stir just until moistened and flour has disappeared. The batter will be a little lumpy. Stir in the bran flakes cereal and optional walnuts or raisins.
Spray a 12-cup muffin pan with nonstick cooking spray. Spoon batter into each cup, about ⅔ full. Bake in the preheated oven for 25-30 minutes or until tops are golden and spring back when lightly touched.
Cool in the pan for 10 minutes, then transfer muffins to a wire rack to cool completely.
From Betty Crocker’s Working Woman’s Cookbook.Nutritional information is approximate and does not include optional ingredients.