100g/3½oz granulated sugar
2 tbsp golden syrup
1 tbsp caster sugar
½ tsp sea salt
330²µ/11½´Ç³ú dark chocolate (55-70% cocoa solids), chopped into small pieces
30g/1oz unsalted butter
80ml/2¾fl oz double cream
whipped double cream, to serve
8 free-range eggs, separated