Esther'S Favorite Christmas Fudge
["2/3 c. cocoa", "3 c. sugar", "1/8 tsp. salt", "1 1/2 c. milk *", "1/4 c. butter or margarine", "1 tsp. vanilla"]
["Thoroughly combine and mix all the dry ingredients in a heavy 4-quart saucepan; stir in milk.", "Bring to a bubbly boil on medium heat, stirring constantly.", "Boil without stirring to 234\u00b0 (to a soft ball stage).", "Remove from heat and add butter or margarine and vanilla.", "Do not stir.", "Cool at room temperature to 110\u00b0. Beat until fudge thickens and loses some of its gloss.", "Quickly spread on a lightly buttered 8 or 9-inch square pan, let cool and cut into squares."]
["cocoa", "sugar", "salt", "milk", "butter", "vanilla"]