Indulge in the cozy, comforting flavors of a timeless French classic with this simple yet decadent French Onion Soup. Rich in buttery onions and a savory beef broth, this recipe is all about bold flavor without unnecessary complexity.

Perfectly caramelized onions are the heart of this dish, bringing a sweetness that balances the savory broth and a touch of sherry. Topped with golden, melted cheese over crisp French bread, each bite is irresistibly satisfying.

Ideal for cold nights or when craving something soul-warming, this French Onion Soup will transform any meal into a bistro experience, right from your kitchen.

Rich and Simple French Onion Soup Ingredients

Unsalted Butter & Olive Oil: A lush blend of butter and olive oil lays the foundation, imparting richness and allowing the onions to gently soften without overpowering them.
Onions: The soul of French onion soup, these sweet, golden slices caramelize to perfection, bringing depth and a touch of sweetness that defines this classic dish.
Beef Broth: Robust and savory, beef broth forms the heart of the soup, enhancing every spoonful with a bold, meaty flavor.
Dry Sherry: A splash of sherry introduces a subtle acidity and warmth, balancing the sweetness of the onions and lifting the broth’s complexity.
French Bread & Cheese Trio: Crisp French bread and melted layers of provolone, Swiss, and Parmesan cheeses create a golden, bubbling topping, transforming each bowl into a rich, indulgent delight.

Recipe Tips for Rich and Simple French Onion Soup

Perfect Caramelization of Onions: The key to achieving a deep, flavorful soup lies in properly caramelizing the onions. Cook them low and slow over medium heat, stirring often to avoid burning. You’re looking for a golden, translucent appearance, not browning, as browning can lead to bitterness. This process may take longer than expected, but it builds the rich, sweet base that French onion soup is famous for. Patience here will yield a depth of flavor that’s worth the wait.
Using Broth for Maximum Flavor: Beef broth is traditionally used for its robust taste, but if you’re seeking an even deeper flavor, consider using a bone broth or a mixture of beef and chicken broths. The added complexity of these broths can elevate the dish, making each sip more satisfying. Also, if you prefer a vegetarian version, a hearty vegetable broth works well, though it will alter the classic taste slightly.
Broiling the Cheese Topping: Achieving that iconic golden, bubbling cheese layer is all about the broiler. Place your bowls under a preheated broiler and watch them closely to prevent burning. Provolone, Swiss, and Parmesan create a unique blend, but you can experiment with Gruyère or even mozzarella for a creamier finish. The cheese should melt thoroughly and form a slightly crispy crust, enhancing the texture and overall eating experience.

What to Serve with Rich and Simple French Onion Soup

Classic Green Salad: A crisp, refreshing salad pairs perfectly with the rich flavors of French onion soup. Consider a simple mix of fresh greens, cucumber, and cherry tomatoes dressed in a light vinaigrette. The acidity of the vinaigrette complements the soup’s savory depth, adding a balance that refreshes the palate.
Crusty Bread or Garlic Bread: Although the soup includes bread topped with cheese, serving it with a slice of freshly baked crusty bread or garlic bread on the side provides an extra element for dipping. The crispy, fragrant bread enhances the texture and lets you soak up every bit of the delicious broth.
Roasted Vegetables: To add some variety and make the meal more filling, serve with a side of roasted vegetables like carrots, zucchini, and bell peppers. Their caramelized sweetness will mirror the soup’s onion base, creating a cohesive yet diverse dining experience.

FAQ for Rich and Simple French Onion Soup

Can I make this soup ahead of time?
Yes, this soup can be made ahead of time. Simply prepare the soup portion and store it in the fridge for up to three days. When ready to serve, reheat the soup, add bread and cheese, and broil until the cheese melts.
What if I don’t have dry sherry?
Dry white wine or apple cider vinegar can be used as substitutes for dry sherry, though each will alter the flavor slightly. White wine adds a similar acidity, while apple cider vinegar gives a slight tanginess.
How can I make this soup vegetarian?
To make it vegetarian, substitute the beef broth with a high-quality vegetable broth. For a richer flavor, consider adding a splash of soy sauce or miso paste to deepen the umami profile.
What type of onions work best?
Yellow onions are ideal for French onion soup due to their balanced sweetness and mild flavor. White onions can be used but may result in a sharper taste. Avoid red onions as they can turn the soup slightly bitter.