Line a 9x9 inch pan with foil and lightly grease it.
In a medium saucepan, combine sweetened condensed milk and white chocolate chips over low heat, stirring constantly, until chocolate is melted and mixture is smooth.
Remove from heat and stir in chopped Oreo cookies.
Pour mixture into prepared pan and spread evenly.
Refrigerate for at least 2 hours or until set before cutting into squares.
Notes
Store in an airtight container for up to one week.