300²µ/10½´Ç³ú caster sugar
250g/9oz sweetened chestnut ±è³Ü°ùé±ð
1 fresh chestnut, peeled, to garnish
1 vanilla pod, split in half and seeds scraped out using a sharp knife
50g/1¾oz plain chocolate
500ml/18fl oz double cream
6 free-range egg whites