Step 1:
1. Set the oven to 180C/gas 4. Lightly butter two sandwich tins, each with a diameter of 20cm. Step 3:
2. Cream together the butter and sugar together until light and fluffy, and then slowly add the beaten egg. Step 5:
3. Fold in the sifted flour and spoon the mixture into the prepared cake tins. Step 7:
4. Bake for 20 minutes. Leave to cool and then remove from the tins. Step 9:
5. Whip the cream until thick and use it to fill the sponge with the jam. Step 11:
6. Dust liberally with icing sugar to serve.
