German Chocolate Cool Bars

1 C. chocolate Oreos
1/4 C. melted butter
2 packages of German sweet chocolate (found in baking section)
1/3 C. milk
1 - 3 oz. package of cream cheese
1 - 16 oz. container of Cool Whip

Crush cookies and combine with melted butter; press mixture into the bottom of a 9" square pan. Take one-half of one package of the chocolate and grate with the fine side of a grater; set aside. In a saucepan, melt the remaining chocolate in the milk over low heat while stirring. Once chocolate is melted, beat in the cream cheese with a wire whisk. Once melted and blended, let cool for 5 minutes. Fold 3 1/2 C. of the Cool Whip into the chocolate mixture. Stir in the grated chocolate and then spread onto cookie crust. Top with remaining Cool Whip and freeze for at least 2 hours.