Christmas Toffee Bars
["2 sticks butter", "1 egg yolk", "1 c. chopped pecans or walnuts", "1 c. brown sugar", "2 c. flour", "5 Hershey chocolate bars"]
["Mix and pour in pan. Bake 25 minutes at 350\u00b0. Cool and cut in small squares."]
["butter", "egg yolk", "pecans", "brown sugar", "flour", "chocolate bars"]