Ingredients
- 4 large yellow onions
- 2 large sweet onions (Vidalia)
- 6 tablespoons butter
- 4 cups beef broth
- 1 baguette
- 6 slices Gruyere cheese
- ¾ cup dry white apple vinegar
Instructions
- Slice onions into ¼-inch pieces.
- Melt butter in a large pot over medium-low heat.
- Add onions; toss to coat and cook uncovered for about 2 hours until caramelized.
- Sprinkle flour over caramelized onions and cook for an additional 2 minutes.
- Pour in beef broth, chicken broth, Worcestershire sauce, bay leaves, and thyme; simmer for 45 minutes.
- Preheat oven to 350°F; slice and toast baguette pieces for about 5 minutes.
- Top toasted baguettes with Gruyere cheese, bake until melted at 450°F.
- Remove bay leaves from soup; season with salt and pepper.
- Serve soup topped with cheesy baguette slices.
- Prep Time: 20 minutes
- Cook Time: 145 minutes
- Category: Soup
- Method: Simmering/Baking
- Cuisine: French
Nutrition
- Serving Size: 1 cup (240g)
- Calories: 340
- Sugar: 8g
- Sodium: 890mg
- Fat: 18g
- Saturated Fat: 10g
- Unsaturated Fat: 7g
- Trans Fat: 0g
- Carbohydrates: 36g
- Fiber: 2g
- Protein: 10g
- Cholesterol: 40mg
Keywords: Use Vidalia or other sweet onions for the best flavor. For vegetarian options, substitute beef broth with vegetable broth. Experiment with different cheeses like Swiss or mozzarella for varied flavors.
