Chocolate Fudge Cake
["3 sq. unsweetened chocolate", "2 c. flour", "2 tsp. baking soda", "1/2 tsp. salt", "1/2 c. butter", "2 1/4 c. packed light brown sugar", "3 eggs", "1 1/2 tsp. vanilla", "1 c. sour cream", "1 c. boiling water"]
["Melt chocolate over hot water; cool.", "Grease and flour two 9-inch round pans.", "Sift flour, soda and salt together.", "Beat butter until soft in large bowl.", "Add brown sugar and eggs; beat at high speed for 5 minutes.", "Beat in vanilla and cooled melted chocolate.", "Stir in dry ingredients alternately with sour cream, beating well with a wooden spoon after each addition until batter is smooth.", "Stir in boiling water.", "Pour at once into prepared pans.", "Bake at 350\u00b0 for 35 minutes."]
["unsweetened chocolate", "flour", "baking soda", "salt", "butter", "brown sugar", "eggs", "vanilla", "sour cream", "boiling water"]