Baileys and chocolate cheesecake

Ingredients         100g/3½oz butter         250g/8¾oz digestive biscuits, crushed         600g/1lb 5oz Philadelphia cream cheese         25ml/1fl oz Baileys         100ml/3½oz icing sugar         300ml/10½oz double cream, whipped         100g/3½oz grated chocolate To garnish         200ml/7¼oz double cream, whipped         cocoa powder, to dust Preparation method     Melt the butter in a pan and add the crushed digestive biscuits. Mix well until the biscuits have absorbed all the butter.     Remove from the heat and press into the bottom of a lined 18cm/7in springform tin. Place in the refrigerator and allow to set for one hour.     Meanwhile, prepare the filling. Lightly whip the cream cheese then beat in the Bailey's and icing sugar. Fold in the whipped cream and grated chocolate. When smooth, spoon evenly onto the biscuits.     Refrigerate and allow to set for a further two hours. Once set, remove and decorate with whipped cream and cocoa powder dusted over the top. Serve.