Line 9"x11" baking dish with parchment paper.
In medium bowl, whisk together pudding mix and milk. Let stand to firm, about 5 minutes. Fold in 1/2 cup cool whip.
Lay 6 graham crackers on bottom of baking dish and top evenly with pudding mixture. Set aside to chill.
In a medium bowl, beat together the cream cheese and marshmallow creme until smooth. Fold in remaining 2 cups Cool Whip and spread evenly over chocolate layer.
Top with remaining graham crackers and cover with foil. Freeze for about 6 hours.
Allow sandwiches to soften at room temperature 15 minutes before eating. Enjoy!