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Slow Cooker French Onion Soup

  • Author: Sarah
  • Prep Time: 20 minutes
  • Cook Time: 6 hours
  • Total Time: 6 hours 20 minutes
  • Yield: Serves 6
  • Category: Main
  • Method: Slow Cooking
  • Cuisine: French

Description

Warm and comforting, this Slow Cooker French Onion Soup features caramelized onions in a rich broth, topped with melted cheese, making it the perfect dish for chilly days.


Ingredients

Scale
  • 4 large yellow or sweet onions, thinly sliced
  • 4 tbsp unsalted butter
  • 6 cups low-sodium vegetable broth
  • 2 tsp fresh thyme (or 1 tsp dried thyme)
  • Salt and pepper to taste
  • 1 French baguette, sliced into thick pieces
  • 2 cups shredded Gruyère cheese

Instructions

  1. 1. Sauté the Onions: In a skillet over medium heat, melt the butter and add the sliced onions. Cook until soft and caramelized, about 20 minutes, stirring occasionally to prevent burning.
  2. 2. Prepare the Soup: In your slow cooker, combine the caramelized onions with vegetable broth and thyme. Season lightly with salt and pepper.
  3. 3. Slow Cook: Cover and set the slow cooker on low for 6 hours, allowing flavors to meld.
  4. 4. Prepare Baguette: About 30 minutes before serving, broil baguette slices until golden brown.
  5. 5. Serve with Cheese: Ladle hot soup into bowls, place toasted baguette slices on top, and sprinkle with Gruyère cheese. Place under the broiler until cheese is bubbly and golden.


Nutrition

  • Serving Size: 1 cup (240g)
  • Calories: 310
  • Sugar: 5g
  • Sodium: 600mg
  • Fat: 18g
  • Saturated Fat: 11g
  • Unsaturated Fat: 6g
  • Trans Fat: 0g
  • Carbohydrates: 29g
  • Fiber: 2g
  • Protein: 10g
  • Cholesterol: 40mg

Keywords: - For a lighter option, replace vegetable broth with homemade vegetable stock. - Consider adding fresh herbs like parsley for extra flavor when serving.