28 Oreos, crushed
1/4 c. melted butter
1/2 gallon vanilla ice cream
1 c. sugar
1 sm. can evaporated milk
1 tsp. vanilla
4 squares semi-sweet chocolate
6 tbsp. butter
1 lg. Cool Whip

Mix Oreos and melted butter in greased 9x13 inch pan. Freeze. Soften ice cream. Spread over frozen crust. Freeze. Mix sugar, milk, vanilla, chocolate and butter in pan. Bring to boil for 1 minute. Cool. Pour over ice cream and refreeze. Spread Cool Whip over chocolate mixture. Keep frozen.