Crust: Preheat oven to 350°F (175°C). Grease a 9-inch pie pan. Melt butter and let it cool. Blend cookies until fine crumbs, reblend any large chunks. Combine butter, crumbs, and salt.
Transfer crumb mixture to pan. Press crumbs along the sides first, then the bottom. Compress crumbs firmly using a flat 1-cup measuring cup. Bake for 10 minutes, then cool completely.
Filling: In a large bowl, beat cream cheese (see note 1), sugar, peanut butter, vanilla, and salt until creamy, about 3 minutes.
If using cream, in a separate bowl, use a stand or hand mixer with the whisk attachment to whip the heavy cream until stiff peaks form.
Gentlyfold whipped cream (or thawed whipped topping) into peanut butter mixture until the mixtures are well integrated.
Pour filling into cooled crust and smooth the top. Cover and refrigerate for at least 8 hours.
Slice with a sharp knife. For cleaner cuts, run the knife under hot water, dry, then slice. Serve directly from the fridge. Optionally, top individual slices with whipped cream, crushed Oreos, and mini Reese’s cups.
Video
Notes
Note 1: Ensure cream cheese is softened to room temperature for a smooth pie. Microwave it outside of its packaging in 10-second bursts, for a total of 20–40 seconds, just until it reaches room temperature. Don’t melt.Note 2: Use smooth commercial peanut butter. Natural types that separate can make the pie oily.Note 3: Completely thaw frozen whipped topping before use. Or use heavy cream, whipped to Cool Whip consistency.Storage: Return any leftovers, covered tightly, to the fridge. Good for up to 5 days.