150g/5oz caster sugar
90g/3oz ground hazelnuts
10-12 whole toasted hazelnuts, to decorate
pinch salt
60g/2oz self-raising flour
200g/7oz dark chocolate, chopped
100驳/3陆辞锄 dark chocolate (70% cocoa solids), chopped
1 tbsp orange liqueur (optional)
110g/4oz unsalted butter, diced
60g/2oz unsalted butter, diced
freshly whipped double cream, to serve
3 large free-range eggs