English Toffee
["2 c. melted milk or semi-sweet chocolate", "1 lb. butter or margarine", "1 lb. (2 1/4 c.) white sugar", "1/4 c. water", "1/2 c. sliced almonds", "1 c. finely chopped walnuts"]
["Need candy thermometer, heavy 3-quart pan and well-greased 12 x 16-inch cookie sheet."]
["milk", "butter", "white sugar", "water", "almonds", "walnuts"]