125驳/4陆辞锄 caster sugar
25g/1oz cocoa powder, sieved
100g/3陆 oz self-raising flour
1 tsp vanilla extract
300驳/10陆辞锄 dark chocolate, broken into pieces
150ml/5fl oz double cream
2 large eggs
125驳/4陆辞锄 baking spread or soft butter, plus extra for greasing
150ml/5fl oz full-fat milk