I want to make green tomato soup but the recipe I have calls for creme fraiche. I cannot get creme fraiche. Will using heavy cream as a substitute smooth out the sourness of the green tomatoes and still be pleasant tasting? I prefer a little sweet to tart tasting anyway.
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.