Toffee Cookie Squares
["1/2 c. butter or margarine", "1/2 c. shortening", "1 c. brown sugar", "1 egg yolk", "1 tsp. vanilla", "1/2 tsp. salt", "2 c. sifted flour", "1 (6 oz.) pkg. semi-sweet chocolate bits", "chopped nuts"]
["Mix all ingredients, except chocolate bits and nuts, and put in large pan.", "Mixture is crumbly.", "Bake in slow oven at 325\u00b0 for 15 to 20 minutes.", "Then melt chocolate bits and pour over top while cookies are still warm.", "Sprinkle with chopped nuts.", "Do not cut until cold."]
["butter", "shortening", "brown sugar", "egg yolk", "vanilla", "salt", "flour", "semi-sweet chocolate bits", "nuts"]