200g/7oz ready-made chocolate hazelnut spread
300驳/10陆辞锄 caster sugar
3 tbsp cocoa powder
150g/5oz hazelnuts, shelled, toasted, roughly chopped
2 tbsp hazelnut liqueur
1 tsp sherry vinegar
1 tbsp sugar
1 vanilla pod, split, seeds scraped out
50g/2oz chocolate (70 per cent cocoa solids), grated
100g/3陆oz unsalted butter
400ml/14fl oz double cream, whipped until soft peaks form when the whisk is removed
200ml/7fl oz double cream
6 free-range egg whites