This is a five-ingredient frosting that every Charlotte grocer stocks year-round—cream cheese and margarine are staples at Harris Teeter, Food Lion, Publix, Walmart, ALDI, and Kroger, with confectioners' sugar running $1.50–$2.50 a box. The stated 10 minutes is honest for mixing; there's no waiting or technique trap. It spreads easily onto warm cinnamon rolls, sets up lightly, and tastes richer than boxed mixes. The only caveat is that it does not hold well once frosted—reheated rolls shed or separate the icing—so frost right before serving or eat the same day.