Double Chocolate Cookie Bars
["2 c. finely crushed Oreos (24 cookies)", "1/4 c. margarine, melted", "2 c. chocolate chips", "1 can Eagle Brand milk", "1 tsp. vanilla", "1 c. walnuts"]
["Combine cookies and butter.", "Press firmly on bottom of a greased 9 x 13-inch pan.", "In medium pan, over medium heat, melt 1 1/2 cups chocolate chips with milk and vanilla.", "Pour evenly over prepared crust.", "Top with nuts and remaining chips.", "Bake for 20 minutes at 350\u00b0.", "Cool.", "Chill, if desired.", "Cut into bars."]
["Oreos", "margarine", "chocolate chips", "milk", "vanilla", "walnuts"]