Decorate cookies. Prepare royal icing following recipe directions. Tint rose and reserve majority 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.