2 tbsp icing sugar
陆 tsp pure vanilla extract
150g pack chocolate sandwich biscuits (such as Oreos)
400g/14oz fudge
115g/4oz unsalted butter, melted
240ml/8陆fl oz double cream
500ml tub raspberry ice cream
500ml tub lemon ice cream
500ml tub pistachio ice cream (or mint choc chip)