Combine 1 box of cookies and the melted butter in a food processor. Combine until smooth.
Press the mixture into the bottom of a cake pin or pie tin.
With a knife, chop 1 sleeve of cookies from the remaining box.
Scoop the ice cream and the cookies into a bowl and stir to combine.
Spread the ice cream and cookie mixture over the crust. Smooth it down.
Spread the Coco Whip on top.
Cover and freeze at least 3 hours.
When ready to serve, melt the chocolate chips and milk together. Whisk until it is glossy and smooth. (Add more milk, if necessary.) Using a spoon, drizzle the chocolate sauce on top of the pie.
Decorate with the remaining cookies.