* COMBINE 1/3 cup sweetened condensed milk and chocolate chips in microwave-safe bowl. Microwave on HIGH (100% power) 30 seconds. Stir until smooth. Place 2 tablespoons chocolate mixture in small resealable plastic bag for drizzle. Spread remaining chocolate mixture evenly onto bottom of pie crust. Chill 10 minutes.
* BEAT remaining sweetened condensed milk, cream cheese and peanut butter in large bowl with electric mixer until smooth. Fold in whipped topping. Spoon over chocolate layer. Cut corner off bag with reserved chocolate mixture. Drizzle over pie.
* FREEZE 1 hour or until firm.
* Can be made ahead and kept in freezer. Transfer from freezer to refrigerator 30 to 45 minutes before serving.