by Justine Pattison

This light chocolate sponge with a smooth chocolate buttercream filling is wonderful for special occasions: it's a real crowd pleaser, can be made ahead and keeps well. For an extra-special cake, you can cover it in melted chocolate (see recipe tips below).

For this recipe you’ll need a 33x23cm/13x9in Swiss roll tin and an electric whisk or freestanding mixer.

Cakes and baking