White Chocolate Cake
["1/3 c. white chocolate, cut in small pieces", "1 1/2 c. sugar", "1 tsp. vanilla extract", "1 tsp. baking soda", "4 egg whites, stiffly beaten", "1/2 c. hot water", "1 c. butter", "4 egg yolks (unbeaten)", "2 1/2 c sifted cake flour", "1 c. buttermilk"]
["Melt white chocolate", "in", "hot", "water;", "allow", "to", "cool. Cream butter and sugar", "together\tuntil light and fluffy.", "Add egg yolks, one at a", "time,", "beating", "well after each addition. Add melted white chocolate and vanilla.", "Sift flour and baking soda together;", "add", "alternately", "with", "buttermilk", "to creamed mixture. Gently fold in stiffly beaten egg whites.\tPour in 3 greased and floured 9-inch layer", "cake pans.", "Bake at 350\u00b0 for 30 to 35 minutes.", "Cool."]
["white chocolate", "sugar", "vanilla extract", "baking soda", "egg whites", "hot water", "butter", "egg yolks", "cake flour", "buttermilk"]