Wet mix: 100g soft butter 280g sugar 2 eggs 250ml cream, full fat 200ml sour cream 60ml milk or coffee or a mixture of the two 1/4 tsp salt Dry mix: 75g good quality cocoa powder 170g flour 1 tsp baking powder 1/2 tsp baking soda Prep: Mix together flour, cocoa, baking soda and baking powder. In a large bowl, whip butter and sugar until fluffy. Add in eggs and whip until smooth.