Decorate cake. Use tip 1 dots of royal icing to attach the tree detail pattern to side of cake. Use toothpick to mark tree details. Remove pattern and wipe off any icing residue from cake using lightly damp paper napkin. Use tip 1, a cut disposable decorating bag and royal icing to pipe design.
Use tip 4, a cut disposable decorating bag and buttercream icing to pipe bead bottom border.