German Chocolate Cake
["1 pkg. Baker's German chocolate", "1/2 c. boiling water", "1 c. butter", "2 c. sugar", "4 egg yolks, unbeaten", "1 tsp. vanilla", "2 1/2 c. sifted Swans Down cake flour", "1 tsp. baking soda", "1/2 tsp. salt", "1 c. buttermilk", "4 egg whites, beaten until stiff"]
["Melt", "chocolate", "in", "1/2", "cup", "of boiling water (cool). Cream butter and sugar until light and fluffy.", "Add egg yolks, one", "at a", "time,", "beating after each.", "Add vanilla and melted chocolate and", "mix", "until", "blended.", "Sift flour with salt and soda.", "Add sifted dry ingredients alternating with buttermilk, beating", "after each", "addition", "until", "batter is smooth.", "Fold stiffly", "beaten egg", "whites.", "Pour batter into an 8 or 9-inch round cake", "pan, lined on bottom with paper.", "Bake in moderate oven (350\u00b0) for 35 to 40 minutes or until it springs back when lightly touched."]
["chocolate", "boiling water", "butter", "sugar", "egg yolks", "vanilla", "flour", "baking soda", "salt", "buttermilk", "egg whites"]