PJ Masks Cake

To make the moon decoration: Cut a 10cm circle out of white card. Using food colouring gel, dye one of the cake batters red, one green, and one navy blue. Using food colouring, colour the main bowl as black, one of the small bowls as pink, one as light green, and one as light blue. Take a small bowl or paper circle with a diameter of 10cm, and use it as a guide to cut three circles of cake out of each of the three cakes. Using a large nozzle piping tip, pipe a layer of black frosting on top of each of them, smooth it out, then top them with a different coloured cake circle.