Onion Soup
Onion soup is a classic dish that brings warmth and comfort to any table. With its rich flavor and savory aroma, this soup is a delightful way to enjoy the sweetness of caramelized onions. Topped with melted cheese and crunchy croutons, it’s an irresistible treat that’s perfect for chilly evenings or as a starter for a gourmet meal. Let’s dive into this simple yet delicious recipe that will surely impress your family and friends!
Ingredients
- 4 large onions, sliced
- 2 tablespoons olive oil
- 2 tablespoons butter
- 1 teaspoon sugar
- 4 cups beef broth
- 1 cup dry white wine
- Salt and pepper to taste
- 1 baguette, sliced
- 2 cups grated Gruyère cheese
- Fresh thyme for garnish
Servings and Cooking Time
This recipe serves 4 people. Preparation time is about 15 minutes, and cooking time is approximately 45 minutes.
Nutritional Value
Per serving (1 bowl): approximately 300 calories, 15g fat, 30g carbohydrates, 10g protein. This analysis is based on a single serving size.
Step-by-Step Cooking Process
- Heat olive oil and butter in a large pot over medium heat.
- Add sliced onions and cook until softened, about 10 minutes.
- Sprinkle sugar over onions to promote caramelization.
- Continue cooking for another 30 minutes, stirring occasionally, until onions are deep brown.
- Pour in the white wine and scrape any bits from the bottom of the pot.
- Add beef broth and bring the mixture to a simmer.
- Season with salt and pepper; let simmer for 15 minutes.
- Preheat your oven to 350°F (175°C).
- In a bowl, ladle soup and top with baguette slices and cheese.
- Bake in the oven until the cheese is bubbly and golden, about 10 minutes.
Alternative Ingredients
If you prefer a vegetarian option, substitute beef broth with vegetable broth. You can also use mozzarella cheese instead of Gruyère for a different flavor profile.
Serving and Pairings
Onion soup pairs beautifully with a fresh green salad, crusty bread, or a light wine such as Sauvignon Blanc. It’s also a great starter for a French meal.
Storage and Reheating
Store leftover onion soup in an airtight container in the fridge for up to 3 days. Reheat on the stovetop or in the microwave. While it is best enjoyed fresh, it can be frozen for up to 2 months; just remember to add the cheese and bread before serving.
Cooking Mistakes
- Don’t rush the caramelization; it’s key for flavor.
- Avoid using pre-sliced onions; fresh ones have better flavor.
- Be careful with salt; taste before adding more.
- Don’t skip the wine; it adds depth to the soup.
- Use a heavy-bottomed pot to avoid burning the onions.
Helpful Tips
- Use a mix of yellow and sweet onions for a balanced flavor.
- For extra richness, add a splash of sherry at the end.
- Garnish with fresh herbs for a pop of color and flavor.
- Make it ahead of time; flavors develop beautifully overnight.
FAQs
Can I make onion soup in a slow cooker?
Yes, you can make onion soup in a slow cooker. Sauté the onions first, then add them to the slow cooker with broth and wine. Cook on low for 6-8 hours for optimal flavor.
What type of bread is best for topping onion soup?
A crusty baguette or French bread works best for topping onion soup as it holds up well to the broth and cheese without becoming soggy.
Can I use other types of cheese?
Yes, while Gruyère is traditional, you can use Swiss, mozzarella, or even cheddar for a different taste. Just ensure it melts well.
How long does it take to caramelize the onions?
Caramelizing onions takes about 30-40 minutes. Patience is vital to achieve that deep, rich flavor.
Is onion soup gluten-free?
To make onion soup gluten-free, use gluten-free bread and check that your broth is also gluten-free.
Conclusion
Onion soup is a timeless classic that combines simple ingredients into a heartwarming dish. With its rich flavors and comforting texture, this recipe is perfect for family gatherings or a cozy night in. Enjoy every spoonful of this delightful soup!

Onion Soup
Ingredients
- 4 large onions sliced
- 2 tablespoons olive oil
- 2 tablespoons butter
- 1 teaspoon sugar
- 4 cups beef broth
- 1 cup dry white wine
- Salt and pepper to taste
- 1 baguette sliced
- 2 cups grated Gruyère cheese
- Fresh thyme for garnish
Instructions
- Heat olive oil and butter in a large pot over medium heat.
- Add sliced onions and cook until softened, about 10 minutes.
- Sprinkle sugar over onions to promote caramelization.
- Continue cooking for another 30 minutes, stirring occasionally, until onions are deep brown.
- Pour in the white wine and scrape any bits from the bottom of the pot.
- Add beef broth and bring the mixture to a simmer.
- Season with salt and pepper; let simmer for 15 minutes.
- In a bowl, ladle soup and top with baguette slices and cheese.
- Bake in the oven until the cheese is bubbly and golden, about 10 minutes.
- Serve hot and garnish with fresh thyme.