For 6 portions you need

4 oz. margarine or butter 4 oz. castor sugar 2 large eggs 4 oz. self-raising flour (or plain flour and 1 level teaspoon baking powder)

Filling

3 tablespoons jam

castor or sieved icing sugar

Cream the butter and sugar until soft and light.
Whisk eggs, beat gradually into the butter mixture, if the mixture shows signs of curdling add a little sieved flour.
Fold in sieved flour with a metal spoon, taking care not to overhandle.
Put into greased and floured or lined tins.
Bake for time and temperature given.
Test cakes before removing from oven - press gently with finger, if no impression remains cake is cooked.
Cool on a wire cooling tray, sandwich with jam, top with sugar.

Oven temperature moderate 375°F - Gas Mark 4-5 Oven position: about 2 rungs from top of oven