- Add the potatoes, carrots, mushrooms, onion, and celery to the bottom of your slow cooker. Place the beef chuck roast on top of the vegetables.
- In a small bowl, whisk together the beef broth, gravy, and seasoning mix until smooth. Pour the mixture evenly over the roast and vegetables.
- Cover and cook on low for 8–10 hours, or until the roast is fall-apart tender. If the meat is still tough, switch to high for an additional 1–2 hours.
- Shred or slice the roast, stir everything gently to coat in the gravy, and serve warm.
Optional: Garnish with fresh parsley