I've always loved homemade cream of mushroom soup, but until recently, I never had the urge to make it myself. This recipe is very easy, but uses some ingredients that you may not wish to share with the kids who still think the canned stuff is better! Dried porcinis and white truffle oil really give this soup its wonderful flavor and aroma. Add some fresh mushrooms if you'd like, but this is great with just the dried. In my kitchen, I use a combination of dried porcini and dried chantarelle. Prep time includes soaking the mushrooms.