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Cut marshmallows in half, and place one half on top of each cookie, cut side down. In small microwavable bowl, microwave remaining frosting uncovered on Medium (50%) 20 to 40 seconds, stirring halfway through, until slightly warm. Spoon frosting on top of marshmallow and cookie to look like melting snow; attach hat to top of each cookie. Attach miniature chocolate chips and orange gumdrop candy for eyes and nose. Allow to set 20 minutes.