Toffee Bars
["2 sticks butter", "1 c. brown sugar", "1 egg yolk", "1 c. flour", "1 pkg. semi-sweet chocolate morsels"]
["Cream together butter and brown sugar. Mix in egg yolk and flour. Pour into 13 x 9 baking dish. Bake at 350\u00b0 for 15 to 20 minutes."]
["butter", "brown sugar", "egg yolk", "flour", "semi-sweet chocolate morsels"]