Chocolate Cake
["1/4 lb. butter", "1 c. sugar", "1 c. brown sugar", "6 egg yolks", "3 Tbsp. cold water", "3 sq. Baker's unsweetened chocolate, melted", "2 c. sifted cake flour", "1 tsp. baking soda", "pinch of salt", "1 tsp. pure vanilla", "1 c. buttermilk"]
["Cream butter and sugar thoroughly.", "Add chocolate.", "Add egg yolks, which have been beaten well with water.", "Sift flour, soda and salt 3 times.", "Add to first mixture alternately with buttermilk until all are used.", "Beat until well mixed.", "Add vanilla.", "Bake in 2 large layer pans (1 1/2 x 9-inch) for about 35 minutes in a 350\u00b0 oven.", "Use a seven minute frosting between layers and a chocolate frosting on top and sides."]
["butter", "sugar", "brown sugar", "egg yolks", "cold water", "chocolate", "cake flour", "baking soda", "salt", "vanilla", "buttermilk"]