Savor the delightful warmth of crockpot French onion soup, a dish that combines the sweetness of caramelized onions with rich broth and gooey cheese. This hands-off recipe allows you to enjoy the process of cooking without constant supervision, making it perfect for busy nights. With every spoonful, you’ll experience the deep flavors and comforting essence that this classic dish is known for.
Ingredients
– 4 large onions, thinly sliced
– 4 cloves garlic, minced
– 4 cups beef broth
– 1 cup dry white wine
– 2 tablespoons olive oil
– 2 teaspoons sugar
– 1 teaspoon thyme
– Salt and pepper to taste
– Baguette slices, for serving
– 1 cup shredded Gruyère cheese
Servings and Cooking Time
This recipe serves 4 people. Preparation time is about 15 minutes, and cooking time in the crockpot is approximately 6-8 hours on low.
Nutritional Value
Each serving (1 cup) contains approximately 220 calories, 10g fat, 30g carbohydrates, and 5g protein. This nutritional information is calculated for one person.
Step-by-Step Cooking Process
1. Heat olive oil in a skillet over medium heat.
2. Add sliced onions and cook until softened.
3. Stir in minced garlic and sugar; cook until onions are caramelized.
4. Transfer the onion mixture to the crockpot.
5. Pour in beef broth and white wine.
6. Add thyme, salt, and pepper.
7. Stir to combine all ingredients.
8. Cover and cook on low for 6-8 hours.
9. About 30 minutes before serving, preheat the broiler.
10. Ladle soup into oven-safe bowls, top with baguette slices and cheese, and broil until cheese is bubbly.
Alternative Ingredients
You can substitute beef broth with vegetable broth for a vegetarian version. Additionally, Swiss cheese can be used instead of Gruyère if preferred.
Serving and Pairings
Crockpot French onion soup pairs wonderfully with a fresh salad, crusty bread, or a classic French baguette. A glass of white wine also complements the flavors beautifully.
Storage and Reheating
Store the soup in an airtight container in the refrigerator for up to 3 days. To reheat, gently warm on the stove or in the microwave. Freezing is possible, but the texture of the cheese may change upon thawing.
Cooking Mistakes
– Don’t rush the caramelization; it enhances flavor.
– Avoid using pre-sliced onions as they may lack taste.
– Use quality broth for the best flavor.
– Don’t skip the wine; it adds depth.
– Adjust seasoning to your taste after cooking.
Helpful Tips
– Slice onions evenly for uniform cooking.
– Stir the soup occasionally for even flavor distribution.
– Use a mix of cheeses for added richness.
– For a touch of sweetness, add a splash of balsamic vinegar.
FAQs
Can I make French onion soup without wine?
Yes, you can omit the wine and use additional broth instead. This will still yield a delicious soup, though the flavor profile will differ slightly.
How do I prevent the onions from burning?
Cook the onions on low heat and stir frequently. If they start to brown too quickly, reduce the heat further.
Can I use other types of cheese?
Absolutely! While Gruyère is traditional, you can use Swiss, mozzarella, or even cheddar for a different flavor.
Is this soup gluten-free?
To make it gluten-free, ensure you use gluten-free broth and bread.
How can I thicken the soup?
If you prefer a thicker consistency, you can add a cornstarch slurry or blend a portion of the soup before serving.
Conclusion
Crockpot French onion soup is a timeless dish that provides comfort and warmth with minimal effort. Perfect for gatherings or a cozy night in, this recipe will surely impress and satisfy. Enjoy each bowl filled with rich flavors and melted cheese!

Crockpot French Onion Soup
Ingredients
- 4 large onions thinly sliced
- 4 cloves garlic minced
- 4 cups beef broth
- 1 cup dry white wine
- 2 tablespoons olive oil
- 2 teaspoons sugar
- 1 teaspoon thyme
- Salt and pepper to taste
- Baguette slices for serving
- 1 cup shredded Gruyère cheese
Instructions
- Heat olive oil in a skillet over medium heat.
- Add sliced onions and cook until softened.
- Stir in minced garlic and sugar; cook until onions are caramelized.
- Transfer the onion mixture to the crockpot.
- Pour in beef broth and white wine.
- Add thyme, salt, and pepper.
- Stir to combine all ingredients.
- Cover and cook on low for 6-8 hours.
- Ladle soup into oven-safe bowls, top with baguette slices and cheese.
- Broil until cheese is bubbly.