The Ultimate Beef Stroganoff Recipe

Name: The Ultimate Beef Stroganoff Recipe
Prep time: 45 min
Total time: 45 min
Ingredients: 2 (.25 ounce) packets unflavored powdered gelatin (about 5 teaspoons); 2 cups homemade or store-bought low-sodium chicken stock; Kosher salt and freshly ground black pepper; 2 tablespoons mild paprika; 4 (1 1/2- to 2-inch thick) beef tenderloin steaks, 6 to 8 ounces each (see note); 3 tablespoons canola or vegetable oil; 12 ounces button mushrooms, quartered; 8 ounces peeled pearl onions (about 24 onions, see note); 3 tablespoons unsalted butter, divided; 1 medium shallot, thinly sliced (about 1/4 cup); 4 sprigs fresh thyme; 1 teaspoon soy sauce; 2 teaspoons Worcestershire sauce; 1 teaspoon Asian fish sauce; 2 teaspoons Dijon mustard; 1 cup dry white wine; 1 cup sour cream, plus more for serving; 1 pound dried egg noodles; 1/4 cup minced fresh parsley leaves