Preheat the oven to 400˚F. Line muffin cups with papers or grease them well.
In a medium pot combine the raisins with 2 tsp. of water. Cook over medium heat until warmed. Remove from heat. (Raisins can also we warmed in a microwave.)
In a large bowl combine the wheat bran, oatmeal, flours, cinnamon, baking powder, baking soda and salt. Add ½ cup of the raisins and stir until well combined.
In a blender or food processor combine the remaining ½ cup of raisins, banana, molasses, yogurt, milk, oil and eggs. Whir for about 30 seconds.
Pour in the wet ingredients into the dry and stir just until combined.
Spoon batter into prepared pan.
Bake for 10 minutes. Reduce temperature to 350˚F and bake for another 10 minutes or until muffins are set.
Allow to cool in pan for 10 minutes then remove to a wire rack to cool completely.