What was missing from the bland mushroom soup was bulk. So many varied soup recipes come down to a similar process: a sauté of onions, leeks or garlic and herbs, a pile of vegetables simmered in stock until soft, then pureed and topped with cream, grated cheese or a splash of booze or if you’re super-lucky, all three. But if you want to make it taste like more than watery vegetables, you’re going to need some volume. Balthazar’s cream of mushroom soup has over two pounds of sliced mushrooms with a relatively small volume of broth coaxing it gently into soup form — there’s nothing more worthy of your spoon. You might, ahem, even determine that it tastes so good, that no, you will not share it and will instead eat it standing over the pot, hungry husbands be damned, even when they catch your selfishness on film. But then again maybe not, as you’re probably a nicer person than me. One can only hope.
Balthazar Cream of Mushroom Soup
Adapted from The Balthazar Cookbook
1 ounce dried mushrooms (porcini, morels, or shitakes)
1/2 cup olive oil
2 sprigs of rosemary
4 sprigs of sage
1 large yellow onion, peeled and thinly sliced
3 garlic cloves, peeled and thinly sliced
1 1/2 teaspoons salt
1/4 tsp freshly ground white pepper
1 pound white button mushrooms, cleaned and thinly sliced
1 pound shitake mushrooms stemmed, cleaned and thinly sliced
6 cups chicken stock or water
1 cup heavy cream
2 tablespoons unsalted butter
1. Soak the dry mushrooms in 1 cup of warm water for 20 to 30 minutes, until plump.
2. Strain the soaking liquid through a coffee filter to remove grit and reserve, along with the reconstituted mushrooms, until needed.
3. Heat the olive oil in a large pot over a medium flame. Bundle the rosemary and sage together and tie with kitchen twine. When the oil is hot, add the herb bundle and sizzle for a few minutes on both sides to infuse the oil.
4. Add the onion, garlic, salt and pepper and cook for 5 minutes, until the onion is soft and translucent but not brown.
5. Turn the flame to high and add the white mushrooms and shitakes.
6. Cook for 10 minutes, during which the mushrooms will give off their liquid (which should evaporate quickly due to the high heat) and deflate significantly. Stir occasionally.
7. Add the chicken stock and the dried mushrooms along with the soaking water.
8. Simmer for 30 minutes. Remove the herbs, then add the cream and butter. Working in batches, puree the soup in a blender until smooth. Return to the pot and keep at a very low simmer until ready to serve.
Deb adjustments: I used far less olive oil, replaced some of the chicken stock with beef, as I had it on hand and love mixing that flavor with mushrooms; half as much cream, preferring a more potent soup and thyme instead of rosemary, also due to personal preference.