Sour Cream Pound Cake
["3 sticks margarine", "3 c. sugar", "1 tsp. vanilla", "7 large eggs, separated", "1 c. or 8 oz. sour cream", "3 c. sifted plain flour with 1 tsp. soda"]
["Cream together margarine and sugar.", "Add vanilla.", "Add 1 egg yolk at a time while beating.", "Add flour and sour cream alternately.", "Beat egg whites until stiff. Fold in cake batter. Cook in tube an for 1 hour and 15 minutes at 325\u00b0."]
["margarine", "sugar", "vanilla", "eggs", "sour cream", "flour"]