This recipe comes from The Doanleigh Inn in Kansas City, Missouri. I got it from a web site. I made some adjustments when I prepared it. I only used one cup of sour cream and 1 tablespoon of vanilla. I put on enough brown sugar to completely cover the blueberries, probably 1 to 1 1/4 cups. It really was quite delicious. The blueberries stay plump and juicy. One left over was quite good the next day, eaten cold. I suggest you play around with the proportions too. Very impressive dessert.