Ingredients

• 9 tablespoons extra-virgin olive oil, divided

• 1 pound cremini mushrooms, trimmed and sliced (about 6 cups)

• 7 ounces fresh shiitake mushrooms, stemmed and sliced (about 3 cups)

• 1 large yellow onion, finely chopped (about 2 cups)

• 4 large garlic cloves, finely chopped (about 4 teaspoons)

• 1/3 cup dry sherry

• 6 cups vegetable broth, divided

• 1 tablespoon fresh thyme leaves, plus more for garnish

• 1 tablespoon ground dried shiitake mushrooms (optional)

• 1 1/2 teaspoons kosher salt, plus more to taste

• 1/4 teaspoon black pepper, plus more for garnish

• 1/2 cup heavy cream