Here’s proof that decked-out cupcakes can be easy as pie. Using a favorite mix, bake a batch of vanilla cupcakes in white paper liners. Let cool completely. Spoon some white frosting into a pastry bag fitted with a large star tip. Pipe a large swirl of frosting on each cupcake, then securely press a decorated, bakery-bought sugar cookie on top. Transfer the decorated cupcakes into colored paper liners to finish of the festive look.