Preparation: Line a 8×8 pan with nonstick foil.

Divide sweetened condensed milk in half and set aside. Chop Oreos.

Place white chocolate, one ½ of sweetened condensed milk, 2 tablespoon of butter in a double boiler stirring until combined. Stir in Oreos and pour mixture into pan.

Place semi-sweet chocolate and remaining half sweetened condensed milk in a double boiler until melted. Pour on top of Oreo layer and refrigerate until set. Cut into squares.