This didn't turn out as I expected, and I think the fault may be with me and not the recipe (so I'm not including a star rating). I used frozen blueberries, and that might have been the problem. I would say do not use frozen blueberries â€” mine tasted kind of tough when . I thought the blueberry filling would have more of some kind of sauce to hold them together, but it didn't. Not sure is that's because the frozen blueberries were drier than fresh would have been and they sucked up the sour cream filling or not. Also, I was expecting more of a flan on top, but there was only a very thin layer of "flan" for me. I will give this recipe another try using fresh blueberries.