Preheat oven to 350°. Line a 13″x 9″pan with aluminum foil, allowing it to extend over edges of pan. Grease/spray foil.
Combine crushed cookies and butter. Press mixture into bottom of prepared pan. Bake for 6-8 minutes.
Combine condensed milk, peanut butter, and vanilla, stirring until smooth. Set aside.
Sprinkle chopped candy bars, chocolate morsels, and peanuts over crust. Drizzle condensed milk mixture over toppings.
Bake for 25-27 minutes or until lightly browned. Cool in pan on wire rack. Using foil, lift out of pan. Peel foil away, and cut into bars.
Makes 28 small or 18 large bars.