Chocolate Nut Bars
["1 3/4 c. graham cracker crumbs", "1/2 c. margarine or butter, melted", "1 (14 oz.) can sweetened condensed milk", "1 (12 oz.) pkg. semi-sweet chocolate chips", "1 tsp. vanilla extract", "1 c. chopped nuts"]
["Preheat oven to 375\u00b0.", "Combine crumbs and margarine; press firmly on bottom of 13 x 9-inch baking pan.", "Bake 8 minutes. Reduce oven temperature to 350\u00b0.", "In small saucepan, melt 1 cup chocolate chips with milk and vanilla.", "Spread chocolate mixture over prepared crust.", "Top with remaining 1 cup chocolate chips, then nuts; press down firmly.", "Bake 25 to 30 minutes.", "Cool. Chill if desired.", "Cut into bars.", "Store loosely covered at room temperature."]
["graham cracker crumbs", "margarine", "condensed milk", "semi-sweet chocolate chips", "vanilla extract", "nuts"]