Toffee Bars
["1/2 lb. butter", "1 c. brown sugar", "1 egg yolk", "1 c. flour", "1 tsp. vanilla", "1 c. chopped pecans", "powdered sugar"]
["Mix all ingredients together, except pecans and powdered sugar, and spread in a 15 x 11-inch pan.", "Whip egg white into soft peaks and spread over batter.", "Sprinkle with chopped pecans over batter. Bake in a 325\u00b0 oven for 30 to 35 minutes.", "Cut after 15 minutes. Sprinkle with powdered sugar."]
["butter", "brown sugar", "egg yolk", "flour", "vanilla", "pecans", "powdered sugar"]