Ingredients
Scale
- 4 large sweet onions (about 2 lbs), thinly sliced
- 1/2 cup unsalted butter
- 8 cups low-sodium beef broth
- 2 tsp fresh thyme leaves
- 1 French baguette, sliced
- 2 cups shredded Gruyère cheese
Instructions
- In a skillet over medium heat, melt the butter. Add the sliced onions and sauté for about 20 minutes until golden brown and fragrant.
- Transfer the caramelized onions to a crockpot. Pour in the beef broth and add thyme. Stir well to combine.
- Cook on low for 6-8 hours or high for 3-4 hours until flavors meld.
- Ladle soup into bowls, top with toasted baguette slices, and sprinkle with Gruyère cheese.
- Broil until the cheese bubbles and turns golden brown.
- Prep Time: 15 minutes
- Cook Time: 6-8 hours
- Category: Soup
- Method: Slow Cooker
- Cuisine: French
Nutrition
- Serving Size: 1 cup (240g)
- Calories: 390
- Sugar: 7g
- Sodium: 900mg
- Fat: 22g
- Saturated Fat: 14g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 40g
- Fiber: 3g
- Protein: 11g
- Cholesterol: 60mg