An impressive dessert with only three ingredients and no baking required? Your secret is safe with us!
Place candy bar pieces in medium microwave-safe bowl. Microwave at MEDIUM (50%) 1 minute or until chocolate is smooth when stirred. Cool slightly.
Fold whipped topping into melted chocolate; spoon into crust. Cover; refrigerate 6 hours or until firm. Garnish as desired. Cover; refrigerate leftover pie.