raspberries and fresh mint sprigs, to serve
250g/9oz plain flour, plus extra for dusting
125驳/4陆辞锄 caster sugar
100驳/3陆辞锄 caster sugar
pinch salt
few drops vanilla extract
1 vanilla pod, split lengthways
400g/14oz dark chocolate, approx 70 per cent cocoa solids
125驳/4陆辞锄 cold butter
50g/2oz butter
400ml/14fl oz double cream
3 free-range egg yolks
250ml/9fl oz single cream