This makes a 9x13 or 2 pies. Crush cookies, I use a food processor. Mix in melted butter to form a crust. (Set aside a little for sprinkling on the top.) In a large bowl combine cream cheese and peanutbutter. Alternate the milk and the powdered sugar, until smooth. Fold in 1 small cool whip that is thawed. Spread it on top of the crust. Take another small cool whip and spread it on the top of the mixture and crust. Sprinkle top with remaining crust mixture. Refrigerate and enjoy. I make this the day before I want to serve it. If you love PB you will love this!!! You could drizzle chocolate on it before serving but you make that decision....I like it just the way it is!!!!