The Best Beef Stroganoff | Dinners | Umami

Ingredients

• 1 pound ribeye steak, trimmed of excess fat and cut into 2-by-1/2-inch strips
• Kosher salt and freshly ground black pepper
• 2 tablespoons vegetable oil
• 5 tablespoons unsalted butter
• 1 medium yellow onion, sliced
• 8 ounces white button mushrooms, quartered
• 7 ounces shiitakes, caps sliced (stems removed and discarded)
• 1 tablespoon chopped fresh thyme
• 1 clove garlic, minced
• 1/2 cup dry white wine
• 2 tablespoons all-purpose flour
• 3/4 cup sour cream
• 1 tablespoon Dijon mustard
• 1 tablespoon Worcestershire sauce
• 1 1/2 cups beef broth or beef stock
• 10 ounces medium or wide egg noodles
• 1/2 cup fresh flat-leaf parsley leaves, chopped
• 1 tablespoon chopped chives, plus more for serving