Directions1. Mix pudding according to package directions, except use 3 1/3 cups of skim milk.
2. Beat in peanut butter.
3. Line a 9 x 13" pan with half of the graham cracker squares. Three squares will have to be cut in half to line the pan.
4. Spread pudding mixture over graham crackers and top with remaining crackers.
5. Freeze for four hours.
6. Cut into squares and remove from pan. Store in a plastic bag in the freezer.