Cover the bran flake cereal with milk and set aside. Let soak for 15-20 minutes.
Preheat oven to 400 degrees. Line a muffin pan with muffin liners or spray with nonstick cooking spray.
Combine flour, baking powder, salt, and brown sugar in a separate bowl.
Add vanilla, oil, egg, and honey to the cereal and milk mixture. Stir.
Add dry ingredients and mix thoroughly.
Divide batter among 12 muffin cups.
Bake muffins for 17-20 minutes (ovens vary). Tops should be lightly golden and the toothpick inserted should come out clean.
