Chocolate Smore Pie

1 graham cracker pie crust, 9 inch
or
12 Small Graham Cracker Tart Cups
4 Hershey's Chocolate Bars
16 marshmallows, large
1/2 cup milk
2 cups Cool Whip®


In heavy pan combine chocolate bars, marshmallows and milk, heat over low heat until melted and smooth. Cool in ice bath. Fold in Cool Whip. Place in pie crust, top with grated chocolate.