On the first try I used salted butter ( didn’t had the unsalted and I didn’t want to go to the grocery store) Huge mistake. The soup came out very salty but the taste was excellent . We used it, along with the mushrooms, to make a good stew Learning, I used the unsalted butter the second time and I, very carefully, added just a little salt at a time when the soup was done and everything went just fine However, because my grocery shop is not a great one, I used white mushrooms (regular) and shiitake mushrooms in addition to the dry porcini I don’t know how the soup is supposed to be with the recommended ones, probably out of this world, but even so it was really good And I’m very picky