Make cookies. Prepare cookie dough and roll out following recipe directions. Cut using bunny cutter from set. Bake and cool completely.
Decorate cookies. Prepare royal icing following recipe directions. Tint rose and black; reserve some white. Use tip 2 and full-strength rose icing to outline middle of ears and outside of cookie. Let set 1 to 2 hours.
Use thinned rose icing in a cut parchment bag to fill in middle of ears. Use thinned white icing in a cut parchment bag to fill in rest of cookie. Let dry 24 hours.
Add details. Use tip 3 and full-strength rose icing to pipe nose; pat smooth with finger dipped in cornstarch. Use tip 2 and full-strength black icing to pipe outline mouth and eyes. Let dry 1 to 2 hours.