Ingredients: • 1 (2-pound) beef chuck roast • 1 (1-ounce) packet au jus gravy mix • 1 (1-ounce) packet ranch seasoning mix • 1 (16-ounce) jar pickled onions (such as Mt. Olive Simply Vidalia Pickled Vidalia® Onion Strips) • 4 cups low-sodium beef stock, or as needed • 1 tablespoon butter, at room temperature • 1 tablespoon all-purpose flour   Cooking utensils: • Slow cooker • Mixing bowl • Forks (for shredding beef) • Measuring cups and spoons • Spoon or spatula   Prep Steps: