oven and let stand at room temperature for 15 minutes (leave oven on). Topping: While cheesecake is baking, combine sour cream, 1/4 cup sugar and 1 tsp. vanilla. Blend well. Cover and refrigerate. Once cake has stood at room temperature for 15 minutes, spread topping over. Return to oven and bake 5 minutes longer. Let cool thoroughly then refrigerate for at least 24 hours or preferably 2 to 3 days. Remove from pan and enjoy! This recipe comes from an old Supervisor of mine (Helen). She used this recipe to sell her cheesecakes professionally. It appears rather basic but is a huge hit with any cheesecake officianado! We used to have raffles as fundraisers for this cheesecake.