55g/2oz cocoa powder, sifted
320g/11oz icing sugar
milk chocolate buttons
200g/7oz self-raising flour
200g/7oz sugar
1 tsp vanilla extract
white chocolate buttons
200g/7oz butter, softened
160²µ/5ΒΎ΄Η³ϊ butter, softened
3 free-range eggs
1-2 tbsp milk