In advance: Make cookies. Prepare and roll out dough. For each treat, cut 1 large heart using 2nd largest cutter from set and 1 small heart using 2nd smallest cutter from set. Bake and cool. Cover with thinned icing. Let dry 24 hours on waxed paper-covered board.
Use patterns to mark designs on cookies. Use tip 1 and full-strength color flow to pipe dot swirls and outline butterfly. Attach small cookie to large using icing.