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Preheat oven to 350°F. In bowl of food processor, grind cookies (including filling) until fine. Crumbs should hold together when pressed or squeezed.
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Press cookie crumbs into the bottom and side of a 9-inch pie pan.
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Bake until aromatic and firm, about ten minutes. Remove crust from oven. Place on a rack to cool. Turn off oven. You are done with it.
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When the crust is cool, prepare the filling. In bowl of a stand mixer or large bowl, whip together peanut butter and cream cheese until smooth.
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Add powdered sugar. Whip until combined. Mixture will be thick.
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Turn off mixer. Add Cool Whip. Turn mixer on to medium-high. Whip until smooth.
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Spread filling into prepared crust. Chill for two hours or overnight.