Preheat oven to 375 degrees F (190 degrees C). Grease muffin tins.
In a mixing bowl, combine bran flakes, flour, brown sugar, cinnamon and baking powder. Stir in apple juice, margarine, vanilla, and apple. Spoon the mixture into the greased muffin tins.
Bake at 375 degrees F (190 degrees C) for 25 to 30 minutes.