1陆 tsp baking powder
1陆 tsp bicarbonate of soda
350驳/12陆辞锄 caster sugar
85g/3oz cocoa powder
225g/8oz plain flour
2 tsp vanilla extract
125ml/4陆fl oz vegetable oil
200g/7oz plain chocolate
200ml/7fl oz double cream
2 free-range eggs
250ml/9fl oz milk