Switch the rainbow sprinkles for Christmas sprinkles, fall leave sprinkles, or red, white, and blue sprinkles for the different holidays. Add about 3/4 to 1 cup of Andes peppermint crunch baking chips to the sugar cookie dough before baking it. Top the swirls of frosting with festive candies like bell shaped chocolates, pieces of peppermint sticks, red and white kisses, etc.