2 tsp instant coffee granules
1 tbsp instant coffee powder, dissolved in 2 tbsp boiling water
1 tsp baking powder
175g/6oz golden caster sugar
175g/6oz self-raising flour
65²µ/2ΒΎ΄Η³ϊ walnut pieces
175g/6oz butter
600ml/1 pint double cream
3 large free-range eggs