This impressive rainbow cake is the perfect celebration ... Add the vanilla extract and beat to combine. Remove the cakes from the fridge and trim the domes off so they are flat.

The Crust: This pie is seriously loaded with all the rainbow colors ... memories of licking the cake batter off the spoon. Storage: By letting the pie chill in the fridge for a couple of hours ...

Chill the cake in the fridge for 1-2 hours, or until firm. Remove the cake from the fridge and spread over another layer of buttercream. For the graffiti, heat the sugar, golden syrup (or liquid ...