3 tbsp golden syrup
175g/6oz icing sugar, sieved
85g/3oz muscovado sugar
300g/10陆oz bourbon biscuits, crushed
85g/3oz dark chocolate, minimum 70 per cent cocoa solids
150驳/5陆辞锄 dark chocolate, minimum 70 per cent cocoa solids
75驳/2陆辞锄 butter, melted
85g/3oz butter
100尘濒/3陆辞锄 double cream
150ml/5陆fl oz double cream, plus extra to serve
2 free-range eggs