Sour Cream Pound Cake
["1/2 lb. butter", "3 c. sugar", "6 egg yolks", "1 (16 oz.) carton sour cream", "1/4 tsp. baking soda", "3 c. flour", "6 egg whites, beaten"]
["Cream butter and sugar; add egg yolks.", "Beat well.", "Add sour cream and baking soda.", "Mix well.", "Add flour gradually, then the beaten egg whites.", "Bake 1 hour and 30 minutes at 300\u00b0."]
["butter", "sugar", "egg yolks", "sour cream", "baking soda", "flour", "egg whites"]