Description
A warm and comforting French Onion Soup made easily in a slow cooker.
Ingredients
Scale
- 6 large yellow onions, thinly sliced
- 4 tablespoons unsalted butter
- 2 tablespoons olive oil
- 1 teaspoon salt
- 1 teaspoon sugar
- 4 cloves garlic, minced
- 8 cups beef broth
- 1 cup dry white wine (optional)
- 2 tablespoons fresh thyme leaves or 2 teaspoons dried thyme
- 1 bay leaf
- 1 tablespoon Worcestershire sauce
- to taste freshly ground black pepper
- 6 slices French bread
- 2 cups shredded Gruyère cheese
Instructions
- In the slow cooker, combine the sliced onions, butter, olive oil, salt, and sugar. Stir to combine.
- Cover and cook on low for 6 hours, stirring occasionally, until the onions are deeply caramelized and golden brown.
- After 6 hours, add the minced garlic and stir well. Cook for an additional 15 minutes.
- Pour in the beef broth and wine (if using). Add thyme, bay leaf, Worcestershire sauce, and black pepper. Stir to combine.
- Cover and cook on low for an additional 30 minutes to allow the flavors to meld.
- Preheat your broiler. While the soup is cooking, toast the slices of French bread until golden brown.
- Once the soup is done, remove the bay leaf. Ladle the soup into individual oven-safe bowls or ramekins.
- Place a slice of toasted bread on top of each bowl and generously sprinkle with Gruyère cheese.
- Broil for 2-5 minutes or until the cheese is melted and bubbly. Keep a close eye to avoid burning.
- Serve immediately and enjoy!
Notes
- For a vegetarian version, you can substitute the beef broth with vegetable broth.
- You can add more herbs like parsley or a splash of sherry for added depth of flavor.
- Leftover soup can be stored in the refrigerator for up to 3 days or frozen for up to a month.
- Prep Time: 15 minutes
- Cook Time: 6 hours 45 minutes
- Category: Soup
- Method: Slow Cooker
- Cuisine: French
Nutrition
- Serving Size: 1 bowl
- Calories: 350
- Sugar: 4g
- Sodium: 800mg
- Fat: 18g
- Saturated Fat: 10g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 36g
- Fiber: 2g
- Protein: 12g
- Cholesterol: 40mg