No-Bake Chocolate Pie

7 milk chocolate candy bars (1.55 ounces each), chopped
20 large marshmallows
1/2 cup milk
2 cups whipped topping
1 graham cracker crust (9 inches)
Additional whipped topping, optional

In a large heavy saucepan, combine the candy bars, marshmallows and milk. Cook and stir over low heat until smooth. Remove from the heat; cool. Fold in whipped topping; pour into crust.

Cover and refrigerate for 4 hours or overnight. Garnish with additional whipped topping if desired. Makes 8 servings.