4 pieces stem ginger (from a jar), finely chopped
1 tsp vanilla extract
25g/1oz plain chocolate
150驳/5陆辞锄 plain chocolate, grated or made into curls
150驳/5陆辞锄 digestive biscuits, crushed
300驳/10陆辞锄 white chocolate buttons, or a bar chopped into pieces
50驳/1戮辞锄 butter, plus extra for greasing
400g/14oz full-fat cream cheese
2 free-range eggs
150ml/5fl oz soured cream