Ingredients

• 4 chicken breast cutlets (4 ounces each, about 1/2 inch thick), trimmed
• ½ teaspoon ground pepper, divided
• ¼ teaspoon kosher salt plus 1/8 teaspoon, divided
• ¼ cup all-purpose flour
• 3 tablespoons extra-virgin olive oil, divided
• 8 ounces cremini mushrooms, sliced
• 8 ounces shiitake mushrooms, stemmed and sliced
• ½ cup chopped yellow onion
• 1 teaspoon fresh thyme leaves, plus more for garnish
• ½ cup marsala
• ½ cup unsalted chicken broth
• ½ tablespoon butter