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Combine Oreo crumbs (for crust) with melted butter.
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Press into the bottom and halfway up the sides of a 9 inch springform pan. Set in refrigerator to firm.
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Mix cream cheese, sugar and vanilla together in a large bowl until smooth and well combined.
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Gently stir in Cool Whip (or homemade whipped cream).
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Add Oreo crumbs and chopped Oreos and gently mix until well combined.
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Pour filling into crust and smooth the top.
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Top with additional Oreo crumbs, if desired.
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Refrigerate for about 4 hours or until firm.