1 c. butter
3 c. sugar
6 eggs, separated
3 c. cake flour
1/4 tsp. baking soda
1 c. sour cream

Cream butter and sugar. Add yolks, one at a time and beat well. Sift soda into flour and resift 3 times. Add flour and sour cream alternately to butter mixture. Stiffly beat egg whites and fold into mixture. Turn into a greased and floured tube pan. Bake in a slow oven at 300 degrees for 1 1/2 hours or until cake shrinks from pan. Enjoy.