Beat chocolate pudding mix and 1 cup milk with a mixer at medium-high speed for 3 minutes or until thickened. Gently fold in half of whipped topping.
Divide chocolate pudding mixture in half, and pour evenly into 2 graham cracker crusts. Repeat procedure with white chocolate pudding mix, remaining 1 cup milk, and remaining half of whipped topping. Divide mixture in half; pour over chocolate pudding mixture in both crusts. Cover and chill 3 hours or until set.
Tip: This recipe makes two pies, so you can freeze one for later. It's good frozen, or you can thaw it in the refrigerator overnight.