2 Days in Advance
Make top hat and bow tie. Tape patterns to cake board. Cover with parchment paper. Prepare royal icing following recipe directions. Use tip 2 and royal icing to outline and pipe in top hat. Pat smooth with finger dipped in cornstarch. Use tip 2 and icing to pipe another layer on hat band and brim for dimension. Pat smooth. While icing is still wet, position Elmo icing decoration.
Use tip 2 and icing to outline and pipe in bow tie. Pat smooth. Use tip 2 to pipe dot knot. Make one hat and tie for each treat. Make extras to allow for breakage and let dry overnight.