Use this large sponge cake recipe as the base for a kids’ party cake. It’s a jam-filled sponge coated with buttercream, ready for you to cover with fondant icing and decorate in any way you like.

Grease and line 3 x 20cm/8in round cake tins. For the chocolate sponge, mix together the flour ... For the chocolate icing, put the plain chocolate in a heatproof bowl over a pan of simmering ...