[header] How to swirl multiple frostings for cupcakes [title] Push your frosting tip into your piping bag. [step] The type of tip you choose will change the style of the frosting. For example, a wilton 2d closed star tip creates a ruffled appearance in the frosting. 
Whereas a wilton 1 m open star tip will give you a smoother look. However, the choice is up to you! [substeps] You can also use a coupler, which allows you to change out the frosting tip without having to use a new piping bag.