255g/9oz summer berries
225g/8oz caster sugar
Icing sugar, to dust
2 tsp vanilla extract
1 tbsp plain chocolate, grated
300驳/10陆辞锄 dark chocolate, broken into pieces
225g/8oz salted butter, cut into cubes, plus extra for greasing
200ml/7fl oz cr猫me fra卯che
6 free-range eggs, separated
1 tsp instant coffee powder