Dad's favourite coffee & walnut cake

Method

1. Preheat the oven to 180°C/Gas Mark 4. Grease and line two 20-cm cake tins.
2. In a mixing bowl, beat the butter until light and smooth. Add the sugar and continue beating until light and fluffy.
3. Add each egg one at a time, mixing to incorporate them into the batter.
4. Add the espresso and stir in.
5. Add the flour and walnuts and fold into the batter.
6. Divide the mixture between the cake tins. Bake for 25-30 minutes, or until the cake is golden and a skewer inserted into the centre comes out clean. Remove the cakes from the oven and leave to cool on a wire rack.
7. To make the icing, beat the butter until pale and smooth. Gradually add the icing, then mix in the dissolved coffee granules.
8. Spread half the icing on to one sponge, sandwich the other sponge on top and cover it with icing. Decorate with walnut halves.