Cut out all the separate pieces of the mask and use them as templates to cut out the pieces of yellow sugar-paste.
Attach each piece to the top of the cake making sure that the pieces are in the right place.
To make the plaque and the number 4, simply cut out a square of yellow and attach it with some Royal Icing, edible glue or water to the front of the cake.
Cut out a number 4 in yellow and another in black with a cutter and attach, first the yellow and then the black.
If you would like to find out how to make this 5.5″ Red Transformer Cake Click Here.