This Slow Cooker French Onion Soup is a comfort food classic made easy. Savory caramelized onions, rich beef broth, and cheesy toasted bread come together in this hearty dish that's perfect for a cozy night in. Let your slow cooker do all the work while you enjoy the delicious aroma filling your home.
Ingredients
- 6 large yellow onions, thinly sliced
- 4 tablespoons butter
- 2 tablespoons olive oil
- 2 teaspoons sugar
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 2 cloves garlic, minced
- 1/2 cup dry white wine
- 8 cups beef broth
- 2 sprigs fresh thyme
- 1 bay leaf
- 1 French baguette, sliced
- 2 cups grated Gruyere cheese
Directions
- In a slow cooker, combine onions, butter, olive oil, sugar, salt, and pepper. Cook on low for 10-12 hours, stirring occasionally.
- Add garlic and white wine, and cook for an additional 30 minutes.
- Stir in beef broth, thyme, and bay leaf. Cook on low for another 6-8 hours.
- Preheat broiler. Ladle soup into oven-safe bowls and top with baguette slices and Gruyere cheese.
- Broil until cheese is melted and bubbly, about 2-3 minutes. Serve hot.
Interesting Facts
French Onion Soup dates back to Roman times when onions were easy to grow and affordable.
The slow cooking process brings out the natural sweetness of the onions, making them caramelized and flavorful.
Gruyere cheese is a traditional choice for French Onion Soup because of its nutty flavor and melting properties.