Preheat oven to 375 degrees In a small bowl, combine flour, nutmeg, cinnamon, salt, and baking soda; set aside. In a large bowl, cream butter, brown sugar, and granulated sugar. Add egg, milk, and vanilla; mix well. Slowly add dry ingredients mixing well after each addition. Stir in oatmeal and unprocessed bran. Add raisins if desired. Drop by rounded teaspoonfuls onto a greased cookie sheet. Bake 8-10 minutes or until done.