1 (15 oz.) pkg. Oreo's (crush and save 1/4 c. for top)
1/3 c. melted butter
1 1/2 c. milk
2 pkgs. instant pudding (pistachio)
1 qt. softened vanilla ice cream
1 (8 oz.) Cool Whip

Mix crumbs and butter and press into a 9x13 pan and freeze 10 minutes.

In a large bowl, thoroughly mix milk and puddings. Slowly stir in softened ice cream. Pour over crust.

Cover with Cool Whip and sprinkle with reserved crumbs. Chill at least 2 hours. Can be frozen and removed from freezer 20 minutes before serving.