Preheat the oven to 350 degrees F.
For the crust: Melt 1 cup of the candy bars with the butter in a small saucepan over medium heat, whisking frequently, about 4 minutes.
Pulse the cookies in a food processor to fine crumbs. Drizzle in the candy mixture until the crumbs are completely coated. Firmly press the crumb mixture into the bottom and up the side of a 9-inch deep-dish pie plate. Bake until the crust is set, 10 to 12 minutes. Spread the dulce de leche over the warm crust with an offset spatula then drizzle with 1/4 cup hot fudge; set aside.
For the filling: Beat the peanut butter, cream cheese and sugar in a large bowl with an electric mixer on medium speed until combined. Whip the cream in a medium bowl with an electric mixer on medium speed until stiff peaks form. Fold the whipped cream into the peanut butter mixture until combined. Fold in the remaining 1 cup chopped candy bars. Pour the filling into the crust, evening out the top with a spatula. Drizzle with the remaining 1/4 cup hot fudge sauce.
Make a decorative ring around the edge of the pie (do not cover the crust) with more chopped candy bars, overlapping them slightly. Inside that ring, make a second ring with the chopped peanuts. Chill until set, at least 4 hours and up to overnight.
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