Ingredient:

• 3 pounds sweet potatoes, peeled and cut into 1-inch cubes (about 8 cups)
• 2 tablespoons butter
• 1 tablespoon Worcestershire sauce
• 1 teaspoon dried minced onion
• 1 teaspoon dried celery flakes, optional
• 1/2 teaspoon salt
• 1/2 teaspoon pepper
• 1/4 teaspoon dried thyme
• 1/8 teaspoon ground chipotle pepper
• 6 cups reduced-sodium chicken broth
• Optional: Sour cream and pepitas