75g/3oz plain flour
225g/8oz caster sugar
50g/2oz caster sugar
75g/30z cocoa powder
100g/3陆oz skinned hazelnuts, chopped
1 vanilla pod, seeds scraped out
225g/8oz dark chocolate (minimum 70 per cent cocoa-solids), melted
100g/3 陆oz pink marshmallows
225g/8oz unsalted butter, melted
butter, for greasing
300ml/陆 pint double cream
4 free-range eggs