Preheat oven to 350 degrees F. Line two large baking sheets with parchment paper and set aside. In a medium bowl, combine bran flakes, oatmeal, cinnamon, baking soda and baking powder. Mix well.
Add the yogurt, applesauce, vanilla, honey, egg and milk and mix well. Fold in the raisins.
Use a medium cookie scoop (1 1/2 Tbsp) to drop dough onto a parchment-lined baking sheet. Bake in the preheated oven for 12 minutes.