Line a 3-cup bowl with plastic wrap. Combine cookie crumbs and butter; press onto the bottom and up the sides of prepared bowl. In a large bowl, beat ice cream and chopped candy bars until blended; spoon into crust. Cover and freeze until firm.
Trim edge of crust even with ice cream if necessary. Invert onto a serving platter; remove plastic wrap. Let stand 10 minutes before cutting. Drizzle with caramel topping. Yield: 4-6 servings.