Preheat oven to 375 degrees F. Grease a muffin tin with non-stick cooking spray and set aside.
Mix the wheat bran and buttermilk together in a large bowl and let that sit for 10 minutes.
In a medium mixing bowl, mix the applesauce, egg, brown sugar, and vanilla together. Add the applesauce mixture to the bran mixture and mix just until combined.
Sift the all-purpose flour, whole wheat flour, baking soda, baking powder, and salt on top of the wet ingredients. Then stir the flour mixture into the wet ingredients, until just combined.
Add 1/2 cup of the muffin batter to 8 of the greased muffin cups and sprinkle some additional brand on top, if desired.
Bake for 15 to 20 minutes or until a toothpick inserted into the center of a muffin comes out clean.
Remove the muffins from the oven and let them cool for 5-10 minutes before removing the muffins from the pan.
Notes
This recipe is made with real wheat bran, NOT cereal. I like to use Bob’s Red Mill brand. An 8 oz. bag will allow you to make about 2 batches following this recipe.
Instead of buttermilk, you can substitute 1 cup of milk + 1 tablespoon of white vinegar. Stir that together and let the milk sit for 5 minutes.
You can add up to 1 cup of mix-ins such as raisins, blueberries, and nuts. These should be folded in at the end, once the dry ingredients have been incorporated.
If you are making kid-sized muffins, use just 1/4 cup of batter per muffin tin cup – which makes about 16 small muffins. If using a mini muffin tin, add about 1 1/2 tablespoons or a medium cookie scoop's worth of batter to each greased tin and bake for 10 to 12 minutes.
Store the muffins in an airtight container for up to 3 days. Or wrap them individually in plastic wrap, and place them in a freezer bag. Freeze for up to 3 months and thaw overnight in the fridge before eating.