• 500g icing sugar
• 160g Trex
• 50mls rice milk (or any other safe milk)
• 1tsp vanilla extract

1. Use a whisk or an electric mixer, beat the Trex until smooth
2. Sift in 100-150g of the icing sugar and continue to beat the mixture on low
3. Gradually add the rest of the icing sugar, whisking all the time
4. Once you’ve added all of the icing sugar, gradually add the milk until the mixture is light and fluffy.  You may need to add less than 50mls, so add slowly until you reach the consistency you require
5. Next add the vanilla extract and continue to beat until the icing is really light
6. Finally, use your buttercream icing to cover cupcakes or cake as required 

You can add other flavourings or colours to change the look for your icing.  For chocolate icing, I added some safe cocoa powder and mixed well.