Crumble two packets of the Asda Cookies and Cream biscuits (320g) or blitz them in a food processor until they form small crumbs.
In a saucepan, melt the butter. Remove from the heat and stir in the crumbled biscuits.
Press this mixture into a 20cm tin (I use one with a removable base) until it covers the base.
In a bowl, mix together the cream cheese and icing sugar.
Lightly whip the double cream and mix into the cream cheese mixture.
Add half a packet (80g) of crumbled cookies and cream biscuits and gently stir into the mixture.
To decorate, cut cookies and cream biscuits in half, then place on the top of the cheesecake. Add a sprinkling of cookies and cream crumbs and serve.