Decorated sugar cookies are fun to make, eat, and give away. Cookie decorating is using royal icing, fondant, or buttercream to decorate sugar cookies. Cookie decorators or cookiers, use piping bags to pipe intricate designs onto cookies that have been cut it specific shapes using cookie cutters. Cookies can be decorated for special events such as birthdays, bridal showers or baby showers or decorated for holidays like Christmas, Halloween, and Valentine's Day. More Information