packed light brown sugar
Heat oven to 375 degrees. Grease muffin cups.
Beat sugar and egg in medium-sized bowl. When smooth, beat in bananas, raisins, oil, and vanilla. Let stand a minute.
Thoroughly mix flours, bran, baking powder, baking soda, cinnamon and salt in large bowl. Add banana mixture and fold in with spatula until dry ingredients are moistened.
Scoop batter into muffin cups. Bake 15 to 25 minutes, or until brown and springy to the touch in the center. Do not overbake. Turn out on a rack to cool.