Vanilla Sponge with Vanilla Buttercream and Raspberry Jam

This is one of the favourite cakes which appears on our tea-table. The lightest sponge cake is filled with a fluffy vanilla-flavoured buttercream and raspberry jam and the top of the cake is dusted with icing sugar. An alternative is to flavour the cake with the grated rind of a lemon, and to fill it with homemade lemon curd and whipped cream. The cake will freeze very well if cooled quickly and frozen immediately. You can fill it two or three hours before serving.