Decorate. Use angled spatula to ice a nose on the center of the cake. Add accent on nose using white icing in a decorating bag with a small hole cut on the end of the bag.
Using a decorating bag with Tip 5 and black icing, pipe eyes and mouth on to cake.
Use angled spatula to ice the center of the ear cookies white. Insert cookies into cake.
Using decorating bags with gray icing and all the star tips from both Rosanna Pansino Decorating Sets, pipe a variety of rosettes and stars to cover the remaining surface of the cake and ear cookies.