50驳/1戮辞锄 caster sugar
cocoa powder, for dusting
100驳/3陆辞锄 dark chocolate, minimum 70% cocoa solids, broken into pieces
4 digestive biscuits, finely crushed
100驳/3陆辞锄 white chocolate
300ml/10fl oz pouring double cream
2 free-range egg yolks
1 tbsp Irish cream liqueur
dash Irish cream liqueur