Toffee Bars
["1 c. butter or margarine", "1 c. sugar", "2 c. sifted flour", "1 egg yolk", "1 tsp. vanilla", "egg white", "1/2 c. finely chopped walnuts"]
["Cream together margarine and sugar.", "Add flour, egg yolk and vanilla, beating well.", "Spread evenly in greased 15 1/2 x 10 1/2 x 1-inch jelly roll pan.", "Brush top with egg white.", "Sprinkle with walnuts.", "Bake at 275\u00b0 for 1 hour and 25 minutes or until golden brown.", "Remove from oven.", "Cut into bars immediately and cool on wire rack.", "Store, tightly covered, at least 3 days before serving.", "Makes approximately 4 dozen."]
["butter", "sugar", "flour", "egg yolk", "vanilla", "egg white", "walnuts"]