Oreo Decadence Bars

23 Oreo Cookies, coarsely crushed
2 T Butter, melted
3/4 c White Chocolate Chips
3/4 c Mini Marshmallows
3/4 c Walnuts, chopped
14 oz Sweetened Condensed Milk

Preheat oven to 350 degrees. Blend cookie crumbs and butter in small bowl. Sprinkle 1 cup crumb mixture over bottom of lightly greased 9 x 9 inch baking pan. Sprinkle with white chocolate chips, marshmallows and walnuts. Top with remaining crumbs. Pour condensed milk evenly over crumbs. Bake for 30 minutes. Cool completely in pan. Cut into bars. Store in airtight container.