Toffee Bars
["1 c. butter", "1 c. brown sugar", "1 egg yolk", "2 c. flour"]
["Cream shortening.", "Add sugar and cream together; add egg yolk. Mix and add flour and mix well.", "Spread on a buttered cookie sheet with hands and bake about 25 minutes at 350\u00b0.", "(Dough will be stiff.)", "While this is baking, melt 1 large bar Hershey milk chocolate bar and about 6 ounces chocolate chips in top of double boiler.", "Spread on top of bars the minute you take them out of the oven and sprinkle with ground walnuts.", "Cut in squares while warm and leave on cookie sheet several hours until chocolate hardens."]
["butter", "brown sugar", "egg yolk", "flour"]