German Chocolate Cake

From my Aunt Mary Bell

1 package German Sweet chocolate
1/2 C boiling water
1 C butter
4 egg yolks unbeaten
1/2 tsp water
4 egg whites
1 tsp baking soda
1 C buttermilk
2 C sugar
1 tsp vanilla
2 1/2 C all purpose flour

Melt chocolate in the boiling water & let cool. Cream butter & sugar till light & fluffy.
Add yolks & beat well. Add chocolate & vanilla, mix well. Sift flour, salt & soda, add to mixture then the buttermilk. Beat until smooth. Beat egg whites till stiff & fold into batter. Bake at 350 degrees 35 minutes
Frost with German chocolate frosting