Decorate treats. Prepare decorating bag with coupler and black icing. Prepare decorating bag with tip 5 and white icing. Prepare third decorating bag with tip 3 and red icing.
Using black icing with tip 5, pipe hair and facial details on treats. Using white icing with tip 5, pipe mouth and whites of eyes. Using red icing with tip 3, pipe heart eyes. To pipe teeth, use black icing with tip 3.