Chocolate Nut Toffee Bars
["1 c. margarine (soft)", "1 c. powdered sugar", "1 1/2 c. flour", "1/3 c. cocoa", "1 can sweetened condensed milk", "2 tsp. vanilla", "1 c. semi-sweet chocolate chips", "1/2 c. chopped nuts"]
["Preheat oven to 350\u00b0.", "Reserve 2 tablespoons margarine.", "In a large mixer bowl, beat remaining margarine and sugar until fluffy. Add flour and cocoa; mix well.", "With floured hands, press into a 9 x 13-inch pan.", "Bake for 15 minutes."]
["margarine", "powdered sugar", "flour", "cocoa", "condensed milk", "vanilla", "semi-sweet chocolate chips", "nuts"]