Slow Cooker French Onion Soup is a comforting and richly flavored classic that’s made even easier with the slow cooker. Caramelized onions slowly simmer in a savory broth until they are tender and sweet, creating a deep, robust flavor. Topped with toasted baguette slices and gooey melted cheese, this soup is a deliciously hearty meal that’s perfect for chilly evenings. The slow cooker does most of the work, making this a stress-free way to enjoy the timeless flavors of French onion soup with minimal effort.
Ingredients:
- 4 large yellow onions, thinly sliced
- 3 tablespoons unsalted butter
- 2 tablespoons olive oil
- 1 teaspoon sugar
- 2 garlic cloves, minced
- 6 cups beef broth (low-sodium)
- 1/2 cup dry white wine (optional)
- 2 tablespoons Worcestershire sauce
- 1 bay leaf
- 1 teaspoon dried thyme
- Salt and pepper to taste
- Baguette slices
- 1 1/2 cups shredded Gruyère or Swiss cheese
Instructions:
- In a large skillet over medium heat, melt the butter with the olive oil. Add the sliced onions and sugar, stirring to coat. Cook the onions, stirring occasionally, until they are caramelized and golden brown, about 25-30 minutes.
- Transfer the caramelized onions to the slow cooker. Add the garlic, beef broth, white wine (if using), Worcestershire sauce, bay leaf, thyme, salt, and pepper.
- Cover and cook on low for 6-8 hours, or until the flavors are fully developed and the soup is rich and fragrant.
- About 15 minutes before serving, preheat your oven to 400°F (200°C). Place the baguette slices on a baking sheet and toast in the oven until golden, about 5 minutes.
- Ladle the soup into oven-safe bowls, place a toasted baguette slice on top of each, and sprinkle generously with shredded Gruyère or Swiss cheese.
- Place the bowls under the broiler for 2-3 minutes, or until the cheese is bubbly and golden.
Enjoy this slow cooker French onion soup as a comforting and flavorful meal, perfect for cozy nights in!
