This frosting is a must for the red velvet cake. Any other kind of frosting just doesn't do justice to the cake!! Cook the milk & flour together until thick - set aside to cool. Beat sugar and granulated suger together until creamy-then add the vanilla. Add the creamed mixture to the cooled milk mixture and stir together. Mix this recipe with an electric mixer. Frost the red velvet cake with this frosting. This frosting is not a real sweet sweet frosting. I make this cake & frosting for many of my friends birthdays. They all say that the frosting makes the cake. Enjoy!