Here's mine.
Note it only bakes 10 minutes or so.
Creamy Topping
1 1/2 cups sour cream
2 Tbs granulated sugar
1/2 tsp vanilla
With a wooden spoon beat sour cream, sugar and vanilla about 1 minute until smooth. Pour over cake and spread gently over surface. Return to oven and bake 10-12 minutes until set. Cool in pan on wire rack, then refrigerate until cold or up to 2 days.