Looking for a no-fuss, deeply flavorful dinner with just three ingredients? Meet your new weeknight hero: Slow Cooker French Onion Beef. Inspired by the rich, savory depth of French onion soup, this recipe brings together thinly sliced onions, beef chuck roast, and a simple French onion soup mix — all in your slow cooker.
With almost no prep time and minimal cleanup, you’ll get meltingly tender beef in a deeply savory broth that tastes like it took hours of hands-on work. In reality, you just set it and forget it.
Why You’ll Love This Recipe
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Only 3 ingredients
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Dump-and-go convenience
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Deep, caramelized onion flavor
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Fork-tender beef
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Perfect for serving with mashed potatoes, noodles, or crusty bread
Ingredients
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2 pounds beef chuck roast
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2 large onions, thinly sliced
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1 packet (about 1 oz) French onion soup mix
💡 Optional: Add ¼ cup of water or beef broth for extra moisture if desired.
Directions
1. Layer the Onions
Place the sliced onions at the bottom of your slow cooker.
2. Add the Beef
Place the chuck roast on top of the onions.
3. Sprinkle the Seasoning
Sprinkle the French onion soup mix evenly over the roast.
(No need to stir or add extra liquid — the onions will release plenty of juice.)
4. Cook Low and Slow
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Cover and cook on LOW for 8–9 hours
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Or on HIGH for 4–5 hours
The meat should be fall-apart tender and the onions soft and caramelized.
5. Shred and Serve
Once cooked, shred the beef with two forks. Stir it gently into the onions and juices. Serve hot!
Tips & Serving Suggestions
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For Gravy Lovers: After cooking, transfer some of the liquid to a saucepan and thicken it with cornstarch for a quick onion gravy.
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Serve With:
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Creamy mashed potatoes
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Toasted baguette or dinner rolls
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Egg noodles or white rice
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Roasted or steamed vegetables
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Description
This Slow Cooker French Onion Beef is all about rich flavor with zero hassle. The sweetness of the slow-cooked onions combined with the savory soup mix creates an irresistible base for the juicy, tender beef. With every bite, you’ll get the taste of a home-cooked meal that feels gourmet — but with barely any work.
Nutritional Info (Approx. per serving)
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Calories: 400
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Protein: 38g
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Fat: 25g
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Carbohydrates: 8g
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Fiber: 1g
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Sodium: 850mg
⚠️ Nutritional values may vary depending on brand and cut of beef used.