Preheat your oven to 350 °F. Line a 12 well muffin tray with paper liners or spray the wells with cooking spray. Set aside.
Mix your bran with the milk in a bowl and let it sit while you prepare the remaining ingredients.
In a large mixing bowl, combine all your dry ingredients and whisk them together.
Add the wet ingredients to the bran mixture and combine well.
Add the wet ingredients into the dry and combine until smooth and well mixed.
Bake at 350 degrees until the tops spring back when touched, about 15-20 minutes depending on your oven.
I like to boil my raisins for a couple minutes before putting them in, I put them in a large measuring cup with hot water, and boil them for 2 minutes in the microwave to plump them up. They are SO much better in the muffins this way, plump and juicy, not dry little shriveled things