Toffee Turtle Bars
["1/2 c. margarine, softened", "1 c. packed brown sugar", "2 c. flour", "1 c. broken pecan halves", "2/3 c. butter", "1/2 c. packed brown sugar", "6 oz. pkg. chocolate chips"]
["Preheat oven to 350\u00b0.", "Mix 1/2 cup margarine, brown sugar and flour until the texture is like fine crumbs.", "Press firmly into ungreased 9 x 13-inch pan.", "Sprinkle pecans on top.", "Set aside."]
["margarine", "brown sugar", "flour", "pecan halves", "butter", "brown sugar", "chocolate chips"]