MICROWAVE chocolate (if using) in medium microwavable bowl on HIGH 1-1/2 minutes or until chocolate is completely melted, stirring every 30 seconds.
SPREAD chocolate or Marshmallow Creme onto one side of each cookie for the ghost's "body." Cool slightly.
DECORATE with gels and/or candies to create "faces." Cool until chocolate is set.
Kids will love this recipe! Easy to make for an afternoon snack.