another one from Kraftfoods.com

Smore Ice Cream Treats
9 graham crackers, broken in half(18 squares), divided
1 C. hot fudge ice cream topping, divided
2 C. mini marshmallows
2 C. chocolate ice cream, softened

Place 9 graham squares in a single layer on bottom of foil lined 9inch square pan. Spread with 1/2 C. fudge topping; sprinkle with marshmallows.
Top with layers of ice cream, remaining fudge topping and remaining graham squares; cover.
Freeze several hours or overnight. Let stand at room temperature 10 min. before cutting into squares.