Grandmother'S Sour Cream Cake
["3 c. sifted flour", "1/4 tsp. soda", "1 c. butter", "1 tsp. vanilla", "3 c. sugar", "1 c. sour cream", "6 eggs, separated"]
["Sift flour.", "Blend with soda.", "Cream butter and sugar.", "Add egg yolks, one at a time.", "Stir in sour cream; add flour and soda to creamed mixture.", "Beat egg whites stiff and fold in.", "Bake in large, greased and floured pans.", "Bake at 300\u00b0 for 1 1/2 hours. Does not need frosting."]
["flour", "soda", "butter", "vanilla", "sugar", "sour cream", "eggs"]