4 Ounce, mixed with water, or milk, about 1 tablespoon (optional)
1. Grease two 7-in. sandwich tins and dust with flour.
2. Cream the fat and sugar.
3. Beat in the eggs gradually.
4. Fold in the sieved flour.
5. Divide between the two tins, making sure the mixture is level.
6. Bake on the top shelf of a moderately hot oven (375°F-Gas Mark 5).
7. Turn out on to a wire rack to cool.
8. When cold, sandwich together with jam and dust the top with sugar.