Description
A comforting and easy slow cooker recipe for French onion soup, topped with crispy baguette and melted Gruyère cheese.
Ingredients
Scale
- 4 large onions, thinly sliced
- 4 cups beef broth
- 1 cup white wine
- 2 tablespoons olive oil
- 2 tablespoons butter
- 1 teaspoon sugar
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 1 teaspoon thyme (dried or fresh)
- 1 loaf of French baguette, sliced
- 2 cups shredded Gruyère cheese
Instructions
- In a skillet, heat olive oil and butter over medium heat. Add sliced onions and cook until deep golden and caramelized, about 20 minutes. Stir in sugar, salt, and pepper near the end.
- Transfer the caramelized onions to the slow cooker. Add beef broth, white wine, and thyme. Stir to combine and adjust seasoning if needed.
- Cover and cook on low for 6–8 hours, until onions are tender and broth is flavorful.
- To serve, ladle soup into oven-safe bowls. Top with baguette slices and shredded Gruyère. Broil until cheese bubbles and turns golden brown.
Notes
Cool soup completely before storing in an airtight container for up to 4 days in the refrigerator. For freezing, keep in airtight containers for up to 3 months and thaw overnight in the fridge before reheating.
- Prep Time: 30 minutes
- Cook Time: 420 minutes
- Category: Soup
- Method: Slow Cooking
- Cuisine: French
Nutrition
- Serving Size: 1 serving
- Calories: 500
- Sugar: 4g
- Sodium: 1200mg
- Fat: 20g
- Saturated Fat: 10g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 40g
- Fiber: 3g
- Protein: 12g
- Cholesterol: 20mg