200g/7oz plain flour
50²µ/1ΒΎ΄Η³ϊ caster sugar
3 tsp cocoa powder
175g/6oz icing sugar
1 tsp vanilla extract
50²µ/1ΒΎ΄Η³ϊ plain chocolate, melted
200g/7oz dark chocolate
200g/7oz butter, softened
300ml/10Β½fl oz double cream
1 large free-range egg, white only
6 large free-range eggs, whites only, lightly beaten