Onion Soup Slow Cooker Pot Roast (Printable)

Slow-cooked beef and vegetables rich with savory onion broth and herbs for warm, comforting meals.

# What You Need:

→ Beef

01 - 3 lbs chuck roast, trimmed

→ Seasoning & Soup Mix

02 - 1 packet onion soup mix, approximately 1 oz
03 - 1 teaspoon black pepper
04 - 1 teaspoon dried thyme, optional

→ Vegetables

05 - 1 lb carrots, peeled and cut into 2-inch pieces
06 - 1 lb baby potatoes, halved
07 - 3 celery stalks, cut into 2-inch pieces
08 - 1 large onion, cut into wedges

→ Liquids

09 - 2 cups beef broth
10 - 2 tablespoons tomato paste
11 - 2 tablespoons Worcestershire sauce

→ For Gravy

12 - 2 tablespoons cornstarch
13 - 2 tablespoons cold water

# Step-by-Step:

01 - Pat the beef chuck roast dry with paper towels. Season with black pepper and dried thyme if using.
02 - Place carrots, potatoes, celery, and onion in the bottom of the slow cooker.
03 - Lay the roast on top of the vegetables.
04 - In a bowl, whisk together beef broth, onion soup mix, tomato paste, and Worcestershire sauce. Pour over the roast and vegetables.
05 - Cover and cook on LOW for 8 hours, or on HIGH for 5 to 6 hours, until the roast is fork-tender and vegetables are cooked through.
06 - Remove the roast and vegetables to a serving platter.
07 - To thicken the sauce, mix cornstarch with cold water, then stir into the slow cooker. Cover and cook on HIGH for 5 to 10 minutes until thickened.
08 - Slice or shred the roast and serve with vegetables. Spoon gravy over the top.

# Expert Suggestions:

01 -
  • The onion soup mix does all the seasoning heavy lifting so you skip the fussy measurements and second-guessing.
  • Your whole house smells incredible while you go about your day, building anticipation for dinner.
  • Fork-tender beef that practically melts without any special technique or overnight marinating.
02 -
  • Resist the urge to peek constantly during cooking—each time you lift the lid, you release heat and add extra time to the process.
  • If your roast seems too fatty, you can trim the exterior before cooking, but a little fat actually keeps everything moist and flavorful during those long hours.
  • The soup mix is salty, so taste the final gravy before adding extra seasoning to avoid oversalting.
03 -
  • Check your slow cooker's size—a six-quart capacity prevents the roast from crowding and allows vegetables to cook evenly.
  • If you're watching sodium intake, swap regular Worcestershire for a low-sodium version or tamari, and choose a soup mix labeled low-sodium.
  • Freeze the braising liquid separately if you have leftovers; it becomes a stellar base for future soups or gravies.
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