How to Pipe Rainbow Buttercream

This rainbow piping technique is simple to do but looks so effective!

Divide the buttercream equally between 5 bowls. Add a few drops of Pink Colour Gel into one bowl of buttercream and mix through, adding a few drops of colour until you have a bright pink buttercream. Repeat this step for each colour until you have 5 different coloured bowls of buttercream. 
Place each colour buttercream into a separate piping bag. Lay a piece of cling film onto your work surface and pipe a strip of each colour buttercream onto the cling film, starting with pink then orange, yellow, green and blue. – make sure the lines of buttercream are not too thick and they should be touching each other.
Once you have piped a line of each colour buttercream roll the cling film to create a sausage shape. Cut the end of the cling film to reveal the buttercream at one end. Place the cling film into a piping bag fitted with a star nozzle.
Pipe a buttercream swirl onto the top of each cupcake to create the rainbow buttercream swirl. 
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