Grandma Church'S Wonderful Fudge
["1/2 c. butter", "14 1/2 oz. can evaporated milk", "4 1/2 c. white sugar", "1/2 lb. marshmallows", "2 oz. unsweetened chocolate", "1 (12 oz.) pkg. semi-sweet chocolate chips", "3 (4 oz.) bars sweet chocolate", "1 Tbsp. vanilla", "2 c. chopped pecans or walnuts (optional)"]
["Stir together in a large heavy pot or Dutch oven, over moderate heat, the butter, canned milk and sugar.", "Bring to a boil.", "Cover. Boil 5 minutes and turn off heat.", "Add marshmallows and stir until melted.", "Add the chocolate, one kind at a time, stirring as it melts.", "Add vanilla and nuts.", "Blend.", "Pour into a buttered 10 x 15-inch jelly roll pan and smooth evenly. Let stand until firm, then cut into 1-inch squares."]
["butter", "milk", "white sugar", "marshmallows", "unsweetened chocolate", "semi-sweet chocolate chips", "sweet chocolate", "vanilla", "pecans"]