German Chocolate Sheet Cake - cooking recipe

Ingredients

1 (4 oz.) pkg. Baker's German's sweet chocolate
1/2 c. water
2 c. all-purpose flour
1 tsp. baking soda
1/4 tsp. salt
2 sticks margarine, softened
2 c. sugar
4 egg yolks (set aside the 4 egg whites)
2 tsp. vanilla
1 c. buttermilk

Preparation

Heat oven to 350\u00b0.
Use sheet cake pan.
Mix 1/2 cup of boiling water with chocolate until chocolate melts.
Mix flour, salt and baking soda.
Beat margarine and sugar until smooth; add one egg yolk at a time and beat.
Stir in chocolate mixture with vanilla; add flour mixture, alternately with buttermilk, beating after addition until smooth.
Beat egg whites until they form a stiff peak.
Gently stir in egg whites into batter.
Pour batter into pans and bake about 30 minutes or until done.