Green tomato soup calls for creme fraiche. I cannot have creme fraiche. If I add heavy creme will it be ok?
If you add only heavy creme the final result will be more smooth and a little bit sweeter (even though green tomatoes are very sour to taste). If you have access to a white yogurt (non sweetened) or greek yogurt you can add that to the soup, maybe by adding it gradually and correcting with cream if the taste degenerates.