Old Fashioned Crock Pot Onion Soup
Warm your soul with this Old Fashioned Crock Pot Onion Soup, a comforting classic made even easier with the magic of a slow cooker. This recipe highlights the deep, caramelized sweetness of six yellow onions, slowly simmered in rich beef broth alongside aromatic thyme, a hint of garlic, and optional dry white wine for added depth. Topped with golden, toasted baguette slices and a generous layer of bubbly, melted Gruyère cheese, this French-inspired soup is a savory masterpiece perfect for cozy dinners or elegant entertaining. With just 20 minutes of prep time and the crock pot doing the rest, this make-ahead onion soup delivers maximum flavor with minimal effort. Serve it piping hot and watch it disappear in no time!
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Recipe Information
Ingredients
- 6 medium Yellow onions
- 4 tablespoons Unsalted butter
- 2 tablespoons Olive oil
- 4 cloves Garlic cloves, minced
- 8 cups Beef broth
- 0.5 cup Dry white wine (optional)
- 1 leaf Bay leaf
- 3 sprigs Fresh thyme sprigs
- 1 teaspoon Salt
- 0.5 teaspoon Black pepper
- 1 loaf French baguette, sliced
- 2 cups Gruyère cheese, shredded
Instructions
Peel and thinly slice the yellow onions into half-moons.
Heat a large skillet over medium heat and add the butter and olive oil. Once the butter has melted, add the sliced onions, stirring to coat them in the fat.
Cook the onions for about 10-15 minutes, stirring occasionally until they soften and start to caramelize. Add the minced garlic in the last two minutes of cooking.
Transfer the caramelized onions to the crock pot.
Pour the beef broth and white wine (if using) into the crock pot. Add the bay leaf, thyme sprigs, salt, and black pepper.
Cover and cook on low for 8 hours or until the flavors are well blended and the onions are tender.
Before serving, preheat your oven broiler. Place a layer of baguette slices onto a baking sheet and toast under the broiler for 1-2 minutes until lightly golden.
Ladle the soup into oven-safe bowls. Place a toasted baguette slice on top of each bowl and generously sprinkle shredded Gruyère cheese on top.
Place the bowls under the broiler for 2-3 minutes or until the cheese is melted and bubbly. Carefully remove from the oven.
Serve hot, garnished with additional thyme if desired.
Nutrition Facts
Calories |
460 | ||
|---|---|---|---|
% Daily Value* |
|||
| Total Fat | 25.2 g | 32% | |
| Saturated Fat | 13.1 g | 66% | |
| Polyunsaturated Fat | 0.0 g | ||
| Cholesterol | 59 mg | 20% | |
| Sodium | 1998 mg | 87% | |
| Total Carbohydrate | 33.9 g | 12% | |
| Dietary Fiber | 2.7 g | 10% | |
| Total Sugars | 6.0 g | ||
| Protein | 19.2 g | 38% | |
| Vitamin D | 0.3 mcg | 2% | |
| Calcium | 399 mg | 31% | |
| Iron | 2.2 mg | 12% | |
| Potassium | 457 mg | 10% | |
*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
