Ingredients

  • 2 ounces dried porcini mushrooms
  • 2 cups boiling water
  • 1/4 cup (1/2 stick) unsalted butter
  • 1 large shallot, chopped (about 1/2 cup)
  • 3 large garlic cloves, chopped
  • 1/2 pound fresh crimini (baby bella) mushrooms, stemmed, caps sliced
  • 1/2 pound fresh shiitake mushrooms, stemmed, caps sliced
  • 1 teaspoon chopped fresh thyme
  • 1 teaspoon chopped fresh sage
  • 1 cup dry vermouth or dry white wine
  • 4 1/4 cups
  • or low-salt chicken broth, divided
  • 1/2 cup creme fraiche
  • 5 teaspoons cornstarch
  • 1 1/2 teaspoons chopped fresh tarragon
  • ingredient info: Dried porcini and creme fraiche are available at many supermarkets and at specialty foods stores.

Method

  • Place dried porcini in large bowl. Pour 2 cups boiling water over. Let stand until soft, stirring occasionally, about 1 hour. Using slotted spoon, transfer porcini to small bowl. Cool porcini, then chop. Pour porcini soaking liquid into medium bowl, leaving sediment behind.
  • Melt butter in large skillet over medium-high heat. Add shallot and garlic. Stir 15 seconds. Add fresh mushrooms, thyme, and sage. Saute until mushrooms are tender, 6 to 7 minutes. Transfer mushrooms to bowl. Add vermouth to skillet; boil 3 minutes, scraping up browned bits. Add 4 cups stock, fresh-mushroom mixture, porcini, and porcini liquid. Boil 10 minutes.
  • Whisk in creme fraiche. Stir 1/4 cup stock and cornstarch in bowl to dissolve; mix into gravy. Cook until gravy coats spoon, about 5 minutes. Season with salt and pepper. DO AHEAD:
  • Whisk tarragon into gravy and serve.