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.