75驳/2陆辞锄 plain flour
陆 tsp baking powder
220驳/7陆辞锄 caster sugar
50g/2oz cocoa powder
200g/7oz sugar
120g/4oz dark chocolate (minimum 70 per cent cocoa solids)
120g/4oz unsalted butter, plus extra for greasing
100驳/3陆辞锄 butter
whipped or clotted cream, to serve
100ml/3陆fl oz double cream
4 free-range eggs