Slow Cooker French onion beef soup combines tender beef, sweet onions, rich broth, toasted baguette, and melted cheese. It has the comfort of French onion soup with extra substance from beef.
About French Onion Beef Soup
A hearty French-inspired soup
Traditional French onion soup is built around onions and broth; this version adds beef chuck or stew meat.
Why caramelized onions matter
Slowly cooked onions develop sweetness and deep savory flavor.
Choosing the beef
Chuck roast becomes tender and shreds easily. Stew meat is convenient and already cubed.
The cheesy topping
Gruyère or Swiss cheese melts over toasted baguette for a classic finish.
French Onion Beef Soup Ingredients
Beef and onions
Use thinly sliced yellow onions and a well-marbled beef cut.
Broth and seasonings
Beef broth, Worcestershire sauce, garlic, thyme, and bay leaf create the base.
Bread and cheese
Choose sturdy baguette slices and Gruyère or Swiss cheese.
How to Make the Soup
Soften the onions
Cook onions in butter over medium-low heat until soft and lightly golden.
Brown the beef
Season and briefly brown the beef for extra flavor.
Slow-cook the soup
Add everything to the slow cooker and cook on LOW until tender.
Add the cheese topping
Shred the beef, ladle soup into oven-safe bowls, and broil with toast and cheese.
Tips, Storage, and FAQs
Thaw beef first
Always thaw meat in the refrigerator before slow cooking.
Keep the lid closed
Repeatedly opening the lid can extend cooking time.
Use oven-safe bowls
Alternatively, broil the cheese on toast separately.
Store leftovers safely
Refrigerate within 2 hours and use within 3–4 days.
Can I omit wine? Replace it with more beef broth.
Slow Cooker French Onion Beef Soup with Melted Cheese
Ingredients
- 2 pounds beef chuck roast or stew meat.
- 5 large yellow onions thinly sliced.
- 4 tablespoons unsalted butter.
- 4 garlic cloves minced.
- 6 cups low-sodium beef broth.
- ⅓ cup dry sherry or additional broth.
- 1 tablespoon Worcestershire sauce.
- 1 teaspoon dried thyme.
- 1 bay leaf.
- 1 teaspoon salt.
- ½ teaspoon black pepper.
- 6 baguette slices toasted.
- 1½ –2 cups shredded Gruyère or Swiss cheese.
Instructions
- Cook onions in butter for 20–30 minutes until softened and golden.
- Season and brown the beef.
- Add onions and beef to the slow cooker.
- Add garlic, broth, sherry, Worcestershire sauce, thyme, bay leaf, salt, and pepper.
- Cook on LOW for 7–8 hours.
- Shred the beef and return it to the soup.
- Top servings with toast and cheese, then broil until bubbling.
