Hot Fudge Sauce
["1/2 c. butter or margarine", "4 oz. sq. unsweetened chocolate", "3 c. sugar", "1/2 tsp. salt", "13 oz. can evaporated milk"]
["Combine butter and chocolate in top of double boiler.", "Cook over hot (not boiling) water until melted.", "Gradually stir in sugar, 1/4 cup at a time, stirring well after each addition. Mixture will be very thick and dry.", "Add salt and milk slowly, stirring constantly.", "Serve hot.", "Yields 4 cups."]
["butter", "unsweetened chocolate", "sugar", "salt", "milk"]