If you find it a little challenging to use a spatula to ice a cake, you can also use tip 789, the cake icer tip, to cover a cake. This method is easier and results in a more even application of icing. When using tip 789, crumb coating is not necessary because the tip won?t agitate crumbs. Using a turntable along with the cake icer tip will make it easier to apply icing and to achieve smooth coverage. For best results, use thin consistency icing.