1.Preheat the oven to 375°F. Spray 12 muffin cups with vegetable oil. 2.Combine the oil, molasses, egg, sugar, banana, vanilla, yogurt and milk in a large bowl and mix until well blended. 3.Combine the bran, both flours, baking powder, baking soda, cinnamon, salt and raisins in another bowl and mix well. Add to the wet mixture and stir just until combined. Spoon into the prepared muffin cups and bake in the center of the oven for about 15 minutes, or until the tops are firm to the touch. Turn out and serve immediately or serve at room temperature.