This Lazy French Onion Soup delivers all the rich, savory goodness of traditional French onion soup with minimal effort. By caramelizing the onions in the oven, you save time and effort while still achieving deep, complex flavors. Finished with crispy toasted bread and bubbly, melted Gruyère, this soup is perfect for cozy nights or elegant dinner parties.
Essential Ingredients
To make this simplified version of French onion soup, you’ll need:
- 3 yellow onions, thinly sliced
- 2 tablespoons olive oil
- 3 thyme sprigs, plus extra for garnish
- 1/4 cup dry sherry
- 6 cups beef broth
- 1 tablespoon Worcestershire sauce
- 1/2 teaspoon freshly ground black pepper
- 1/2 teaspoon kosher salt
- 1 fresh or dried bay leaf
- 2 teaspoons apple cider vinegar
- 12 (1/2-inch-thick) slices French bread or baguette, lightly toasted
- 8 ounces Gruyère cheese, shredded
Preparation Steps
- Preheat and Prep: Preheat the oven to 425°F (220°C) and place the rack in the middle position.
- Caramelize Onions in the Oven: In a heavy-bottomed pot or Dutch oven, combine onions, olive oil, and thyme sprigs. Cover and bake for 40 minutes, stirring once halfway through. Uncover and continue baking, stirring occasionally, until the onions are golden brown and caramelized (about 30 more minutes).
- Deglaze the Pot: Remove the pot from the oven, stir in dry sherry, and cook over medium heat, scraping up browned bits until the liquid mostly evaporates (about 3 minutes).
- Make the Soup Base: Add beef broth, Worcestershire sauce, black pepper, salt, and bay leaf. Bring to a boil over high heat, then reduce to medium-low and let simmer for 15 minutes. Stir in apple cider vinegar and discard thyme sprigs and bay leaf.
- Prepare for Broiling: Increase oven temperature to broil. Ladle soup evenly into 6 broiler-proof bowls or crocks, and place them on a rimmed baking sheet.
- Top and Broil: Place 2 slices of toasted bread on top of each bowl of soup and sprinkle with about 1/3 cup of shredded Gruyère cheese. Broil until the cheese is melted, bubbly, and slightly browned (3 to 5 minutes).
- Serve and Garnish: Sprinkle with fresh thyme leaves and serve immediately.

Health Benefits
- Rich in Antioxidants: Onions are packed with antioxidants that support immune function and reduce inflammation.
- Protein-Packed: The combination of beef broth and Gruyère cheese provides a good source of protein.
- Supports Digestion: Apple cider vinegar aids digestion and balances flavors.
- Calcium Boost: Gruyère cheese is an excellent source of calcium for strong bones.
Serving Suggestions
- With a Side Salad: A simple arugula or mixed greens salad with a vinaigrette pairs beautifully with this rich soup.
- Paired with Wine: Enjoy with a glass of dry white wine (like Sauvignon Blanc) or a light-bodied red (like Pinot Noir).
- Extra Garnish: Sprinkle with additional black pepper or a pinch of nutmeg for extra depth of flavor.
Creative Variations
- Vegetarian Version: Substitute beef broth with vegetable broth for a meat-free option.
- Stronger Cheese Flavor: Try Comté, Emmental, or even Parmesan for a different cheese profile.
- Bolder Flavor: Add a splash of brandy or cognac instead of sherry for a deeper richness.
- Extra Crunch: Use sourdough or a rustic country bread instead of a soft baguette.
Storage Tips
- Refrigerate: Store soup (without bread and cheese) in an airtight container for up to 4 days.
- Freeze: Freeze soup in portions for up to 2 months. Thaw overnight in the refrigerator before reheating.
- Reheat Properly: Warm on the stovetop over medium heat. Toast fresh bread and broil with cheese just before serving.
Pro Tips
- Even Caramelization: Stir the onions occasionally while baking to ensure even browning.
- Use Quality Cheese: Gruyère melts beautifully, but using freshly shredded cheese ensures the best texture.
- Thicker Soup: Reduce broth slightly or add more caramelized onions for a thicker consistency.
- Oven Safety: Ensure your soup bowls are broiler-safe before placing them under direct heat.
Frequently Asked Questions
Can I use red onions instead of yellow onions?
Yes! Red onions will add a slightly sweeter taste but work well in this recipe.
What can I use instead of sherry?
You can substitute with dry white wine, brandy, or even a splash of balsamic vinegar.
Can I make this soup ahead of time?
Absolutely! Prepare the soup base in advance, then reheat and broil with bread and cheese just before serving.
Enjoy this Lazy French Onion Soup, a hassle-free way to experience the deep, savory flavors of a French classic with minimal effort!
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Lazy French Onion Soup
This Lazy French Onion Soup simplifies the classic dish by caramelizing onions in the oven, reducing the need for constant stirring. The result is a deeply flavorful, rich broth topped with toasted baguette slices and bubbly, melted Gruyère cheese. Perfect for a cozy dinner or an elegant appetizer
- Total Time: 2 hours 5 minutes
Ingredients
To make this simplified version of French onion soup, you’ll need:
- 3 yellow onions, thinly sliced
- 2 tablespoons olive oil
- 3 thyme sprigs, plus extra for garnish
- 1/4 cup dry sherry
- 6 cups beef broth
- 1 tablespoon Worcestershire sauce
- 1/2 teaspoon freshly ground black pepper
- 1/2 teaspoon kosher salt
- 1 fresh or dried bay leaf
- 2 teaspoons apple cider vinegar
- 12 (1/2-inch-thick) slices French bread or baguette, lightly toasted
- 8 ounces Gruyère cheese, shredded
Instructions
- Preheat and Prep: Preheat the oven to 425°F (220°C) and place the rack in the middle position.
- Caramelize Onions in the Oven: In a heavy-bottomed pot or Dutch oven, combine onions, olive oil, and thyme sprigs. Cover and bake for 40 minutes, stirring once halfway through. Uncover and continue baking, stirring occasionally, until the onions are golden brown and caramelized (about 30 more minutes).
- Deglaze the Pot: Remove the pot from the oven, stir in dry sherry, and cook over medium heat, scraping up browned bits until the liquid mostly evaporates (about 3 minutes).
- Make the Soup Base: Add beef broth, Worcestershire sauce, black pepper, salt, and bay leaf. Bring to a boil over high heat, then reduce to medium-low and let simmer for 15 minutes. Stir in apple cider vinegar and discard thyme sprigs and bay leaf.
- Prepare for Broiling: Increase oven temperature to broil. Ladle soup evenly into 6 broiler-proof bowls or crocks, and place them on a rimmed baking sheet.
- Top and Broil: Place 2 slices of toasted bread on top of each bowl of soup and sprinkle with about 1/3 cup of shredded Gruyère cheese. Broil until the cheese is melted, bubbly, and slightly browned (3 to 5 minutes).
- Serve and Garnish: Sprinkle with fresh thyme leaves and serve immediately.
- Prep Time: 15 minutes
- Cook Time: 1 hour 50 minutes
- Category: Soup
- Cuisine: French
Nutrition
- Serving Size: 6
- Calories: 546 per serving