1 cup flour
Preheat over 375 F. Butter standard muffin tins.
In a medium bowl, stir and toss together the flour, bran, baking soda, salt and nuts. Set aside. In another medium bowl, beat together the banana and butter until mixed. Add brown sugar and egg and beat until completely mixed. Add the combined dry ingredients and stir just until blended.
Makes about 12 standard muffins.