German Chocolate Cake - cooking recipe

Ingredients

1/2 c. boiling water
1 (4 oz.) bar sweet cooking chocolate
1 c. butter or margarine, softened
2 c. sugar
4 egg yolks
1 tsp. vanilla
2 1/2 c. cake flour or regular flour plus 2 Tbsp. sifted
1 tsp. soda
1/2 tsp. salt
1 c. buttermilk
4 egg whites, stiffly beaten

Preparation

Heat oven to 350\u00b0.
Grease three round layer pans, 8 or 9-inches.
Line with wax paper.