1 c. butter
3 c. sugar
6 egg yolks
3 c. flour
1 c. sour cream
1 tsp. vanilla
1/4 tsp. baking soda
1/4 tsp. salt

Cream sugar and butter; add egg yolks. Beat. Sift dry ingredients together. Add vanilla to egg mixture. Then add sour cream and flour mixture alternately. Beat egg whites and fold in. Bake at 350 degrees for 1 hour and 25 minutes in Bundt pan or 1 hour in two long narrow loaf pans. Sprinkle with powdered sugar while slightly warm.