Cbeebies Mike the Knight Castle Cake for my son's 4th Birthday. (Mummy you forgot the tree... and I'm missing a square tower and a bridge but hey ho!) Square sponge with Nutella filling. Royal icing with royal icing 'cobbles'. Walls and towers made from coloured rice crispy/sugar puff and marsh mallow mixture. Fondant board, draw bridge and windows. Cornets for turrets with royal icing tiles. Sugarpaste Mike the Knight, shield and flags (on florist wire).