[header] How to pipe frosting neatly [title] Learn the right consistency and recipe for your frosting. [step] Too thick, and the icing and piping will be too hard to spread and can rip the surface of the cake. Too thin, and the results will be too runny and hard to control. 
Also chocolate and other ingredients used in the icing can affect how it behaves, as well. [title] Choose gel paste food coloring instead of liquid food coloring.