For the final technical challenge Mary Berry asked the bakers to make this simple sponge with homemade jam and buttercream – without a recipe. For this recipe you will need two sandwich tins, an electric mixer and piping bag fitted with plain nozzle.
Tunis cake, A moist, lemony sponge topped with chocolate ganache and marzipan decorations. It looks wonderfully festive and is a great alternative to traditional Christmas cake. Equipment and preparation: you will need a deep cake tin.