icing sugar, to taste
1 tsp vegetable oil
200g/7oz chocolate digestive biscuits, crushed to fine crumbs
400g/14oz milk chocolate (35% cocoa solids), or you can use a mixture of 300g/10陆oz milk chocolate and 100g/3陆oz dark chocolate (70% cocoa solids)
50驳/1戮辞锄 white chocolate
75g/3oz butter, melted and cooled slightly
800g/1lb 12oz cream cheese