Sour Cream Cake
["3 c. sugar", "3 eggs, separated", "1 (8 oz.) carton sour cream", "1 c. margarine", "1/4 tsp. soda", "3 c. flour", "1 tsp. vanilla", "nuts (optional)"]
["Combine sugar and margarine.", "Add egg yolks one at a time. Dissolve soda in sour cream.", "Add sour cream and flour alternately.", "Beat egg whites and add.", "Add vanilla.", "Bake at 350\u00b0 for 1 hour and 15 minutes."]
["sugar", "eggs", "sour cream", "margarine", "soda", "flour", "vanilla", "nuts"]