1 tsp lemon juice
175g/6oz plain flour
150g/5陆oz ready-to-eat prunes (ideally d鈥橝gen), cut into quarters
2 tbsp cocoa powder
2 tbsp icing sugar
1 tsp vanilla extract
75驳/2陆辞锄 dark chocolate, broken into small pieces
100g/3陆oz cold unsalted butter, cut into roughly 1cm/陆in dice
125ml/4fl oz double cream
2 free-range medium eggs, beaten
1 free-range egg, yolk only
200g/7oz mascarpone
1 tbsp brandy