2 tbsp plain flour
175g/6oz caster sugar
2 tbsp icing sugar
150驳/5陆辞锄 raisins, soaked in 100ml/3陆fl oz white rum
5 drops vanilla extract
10 digestive biscuits
50驳/1戮辞锄 butter, melted
600g/1lb 5oz cream cheese
2 free-range eggs, plus 1 egg yolk
2 x 142ml/5fl oz pots soured cream