1. Remove wrappers from peppermint patties; cut into quarters. Place peppermint pieces and milk in medium microwave-safe bowl,
2. Microwave at MEDIUM (50%) 1 minute; stir. Microwave at MEDIUM an additional 30 seconds to 1 minute or just until candy is melted and smooth when stirred. Cool slightly.
3. Fold whipped topping into melted mixture; spoon into crust. Cover; freeze 6 to 8 hours or until firm. Garnish with additional whipped topping and peppermint pieces, if desired. 6 to 8 servings.
* NOTE: Do not use 'extra creamy' or 'light' whipped topping.