Toffee Squares
["2 sticks butter or margarine", "1 c. brown sugar", "1 egg yolk", "1 tsp. vanilla", "2 c. flour", "1/4 tsp. salt", "6 oz. chocolate chips", "1/2 c. chopped nuts"]
["Blend butter, sugar, egg yolk and vanilla.", "Add flour and salt. Blend well.", "Pat mixture into the bottom of a greased 13 x 9 x 2-inch pan.", "Bake at 350\u00b0 for approximately 25 minutes.", "Mixture will be soft, but lightly browned."]
["butter", "brown sugar", "egg yolk", "vanilla", "flour", "salt", "chocolate chips", "nuts"]