Double Chocolate Cookie Bars
["2 c. finely crushed creme-filled chocolate sandwich cookies (24 cookies)", "1 c. chopped nuts", "2 c. (12 oz.) semi-sweet chocolate chips", "1/4 c. margarine or butter, melted", "1 (14 oz.) can sweetened condensed milk (not evaporated milk!!)", "1 tsp. vanilla extract"]
["Preheat oven to 350\u00b0.", "Combine crushed cookies and margarine; press firmly on bottom of 13 x 9-inch baking pan."]
["creme-filled", "nuts", "semi-sweet chocolate chips", "margarine", "condensed milk", "vanilla extract"]