Beat milk, pudding mixes and 1/2 of the whipped topping in medium bowl with wire whisk 1 minute. (Mixture will be thick.) Reserve 1/4 cup of the candy bar pieces; stir remaining pieces into pudding mixture. Spoon into crust.
Spread remaining whipped topping over pudding mixture; sprinkle with remaining candy pieces. Serve immediately or refrigerate until ready to serve.