Royal Icing for Marshmallow Treats

In the bowl of an electric mixer fitted with the paddle attachment, combine confectioners' sugar and meringue powder with scant 1/4 cup water on low speed. Mix until fluffy yet dense, 10 to 15 minutes.

Color the icing as needed starting with a small amount of gel food coloring.Transfer to a small pastry bag fitted with a 1/32-inch pastry tip (#1 Ateco).

If making marshmallow treats, pipe faces as desired, or pipe eyes on both sides of coated chicks and two eyes and a nose on bunnies. Pipe one eye on flat bunnies and chicks. Store the royal icing in an airtight container up to a week, and stir before using.