200g/7oz plain flour
50驳/1戮辞锄 caster sugar
3 tsp cocoa powder
175g/6oz icing sugar
1 tsp vanilla extract
50驳/1戮辞锄 plain chocolate, melted
200g/7oz dark chocolate
200g/7oz butter, softened
300ml/10陆fl oz double cream
1 large free-range egg, white only
6 large free-range eggs, whites only, lightly beaten