Line a loaf pan with parchment paper or aluminum foil, leaving an overhang on each side.
Beat the whipping cream until stiff peaks form.
In a separate bowl beat the cream cheese, powdered sugar, and peanut butter until smooth.
Beat in the whipping cream.
To assemble the cake, dip each Oreo in milk first. Place a layer of Oreo cookies into the bottom of the pan, then spread about 1/3 of the butter (about 1 cup) on top. Repeat with a layer of Oreos dipped in milk, followed by about 1/3 of the batter. Repeat with another layer of Oreos & the rest of the peanut butter filling.
Place in the freezer to set for 4 hours. Top with crushed Oreos, chocolate sauce, peanuts, or whatever toppings you prefer.