Fudgy Chocolate Cookie Bars
["1 3/4 c. flour", "3/4 c. confectioners sugar", "1/4 c. Hershey's cocoa", "1 c. cold margarine or butter", "12 oz. pkg. chocolate chips", "14 oz. can sweetened condensed milk", "1 tsp. vanilla extract", "1 c. chopped walnuts"]
["Preheat oven to 350\u00b0.", "In bowl combine flour, sugar and cocoa. Cut in margarine until crumbly.", "Press on bottom of a 13 x 9-inch pan.", "Bake 15 minutes.", "In saucepan, melt 1 cup chips with sweetened condensed milk and vanilla.", "Pour over crust.", "Top with walnuts and remaining chocolate chips.", "Press down firmly.", "Bake 20 minutes or until set.", "Cool.", "Cut into bars."]
["flour", "confectioners sugar", "cocoa", "cold margarine", "chocolate chips", "condensed milk", "vanilla extract", "walnuts"]