Slow Cooker Beef Onion Soup
A rich and comforting slow cooker beef onion soup made with tender beef, caramelized onions, and savory broth, perfect for a cozy meal.
- Prep Time: 15 minutes
- Cook Time: 6 hours
- Total Time: 6 hours 15 minutes
- Yield: 6
Ingredients
2 tablespoons olive oil
2 pounds beef chuck roast, cut into 1-inch cubes
4 large yellow onions, thinly sliced
4 cloves garlic, minced
6 cups beef broth
1 tablespoon tomato paste
1 teaspoon dried thyme
1 teaspoon dried rosemary
2 bay leaves
1 teaspoon salt
1/2 teaspoon black pepper
1 tablespoon Worcestershire sauce
1 tablespoon cornstarch
2 tablespoons cold water
6 slices French bread, toasted
1 1/2 cups shredded Gruyère cheese
Instructions
Heat olive oil in a large skillet over medium-high heat.
Add beef cubes and brown on all sides, about 5-7 minutes. Transfer browned beef to the slow cooker.
In the same skillet, add sliced onions and cook over medium heat until caramelized, about 15 minutes, stirring occasionally.
Add minced garlic and cook for 1 minute until fragrant.
Transfer caramelized onions and garlic to the slow cooker with the beef.
Add beef broth, tomato paste, dried thyme, dried rosemary, bay leaves, salt, black pepper, and Worcestershire sauce to the slow cooker. Stir to combine.
Cover and cook on low for 6 hours until beef is tender and flavors are well blended.
About 15 minutes before serving, remove bay leaves from the slow cooker.
In a small bowl, mix cornstarch and cold water until smooth. Stir the mixture into the soup to thicken slightly.
Cover and cook on high for 15 minutes more.
Preheat the broiler.
Ladle soup into oven-safe bowls. Place a toasted slice of French bread on top of each bowl of soup.
Sprinkle shredded Gruyère cheese evenly over the bread slices.
Place bowls on a baking sheet and broil until cheese is melted and bubbly, about 3-5 minutes. Watch carefully to prevent burning.
Serve hot and enjoy your slow cooker beef onion soup.