Cover your Christmas cake with marzipan and sugar paste.
Knead the green sugarpaste to soften it and then roll it out on a surface lightly dusted with icing sugar. Wet the top of the cake drum with water and lift the green sugarpaste over it. Press it down against the board and trim away the excess sugarpaste from around the board, then polish the surface smooth, using an icing smoother or side scraper. Place a little apricot jam in the centre of the board and slide the white-covered cake on top.
Draw around the cake tin you used and then draw a face - this will be used as a template later.
Knead the red sugarpaste to soften it and roll it out into a long strip, just wider than the height of the cake. Cut one edge to give a straight line. Brush water on the side of the cake. Roll up the red sugarpaste and then unwrap it around the cake, with the straight cut edge against the cake drum.
Rub the red sugarpaste smooth with the smoother or side scraper, and then use a knife to cut away the surplus around the top edge.
Roll out some more red sugarpaste and cut out the hat. Brush water on the back of the piece and stick it into place.
Roll out some of the flesh-coloured sugarpaste, cut out the face shape and stick in place with water. Roll out some white sugarpaste and cut out the brim of the hat. Use a round cutter to cut the bobble for the hat and both sides of the moustache, and leave to dry flat.
Add some Trex or White Flora to the black sugarpaste to soften it enough to go through the sugarcraft gun. If you don’t have a sugarcraft gun, then roll out the sugarpaste by hand. Brush water on to the cake where the black lines are needed, position it on the cake, or squeeze the sugarpaste into place if using a gun. Press it down lightly. When the bobble is dry, stick it on top of the hat.
Roll 2 balls and stick into place for the eyes, and make a curved shape for the mouth. Roll an oval shape of flesh-coloured sugarpaste and stick in place for the nose. Place a line of black sugarpaste around the base of the cake. Secure the ribbon around the edge of the cake drum, using double-sided sticky tape.