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Crock Pot French Onion Soup

A comforting dish featuring sweet caramelized onions in a savory broth, topped with melted cheese and served with toasted bread.
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Prep Time 20 minutes
Cook Time 12 hours
Total Time 12 hours 20 minutes
Servings: 6 servings
Course: Appetizer, Main Course
Cuisine: Comfort Food, French
Calories: 350
Ingredients Method Notes

Ingredients
  

Main Ingredients
  • 4 large large onions (yellow or sweet)
  • 4 cloves cloves of garlic, minced
  • 6 cups beef broth (or vegetable broth for a vegetarian option) Vegetable broth can be used for a vegetarian version
  • 1 tablespoon olive oil
  • 1 tablespoon butter
  • 1 tablespoon fresh thyme (or 1 teaspoon dried thyme)
  • 1 tablespoon balsamic vinegar
  • to taste Salt and pepper
  • 1 cup shredded Gruyère cheese (or Swiss cheese)
  • 1 loaf French baguette, sliced for serving

Method
 

Preparation
  1. Slice the onions thinly, ensuring even caramelization.
  2. Heat olive oil and butter in a skillet over medium heat.
  3. Add the sliced onions and minced garlic, stirring occasionally for 15-20 minutes until soft and caramelized.
  4. Transfer the caramelized onions and garlic to the crock pot.
  5. Add beef or vegetable broth, thyme, balsamic vinegar, salt, and pepper.
Cooking
  1. Cover the crock pot and set it on low for 10-12 hours or high for 5-6 hours.
  2. Once finished, stir the soup and taste, adjusting seasoning as needed.
Serving
  1. Preheat your oven to 400°F (200°C).
  2. Place sliced baguette on a baking sheet, top with shredded cheese, and toast until melted and golden, about 5-7 minutes.
  3. Ladle the soup into bowls, place a toasted baguette slice on top, and enjoy.

Notes

For the best flavor, do not rush the caramelization of the onions. Store leftovers in an airtight container for up to 3-4 days, or freeze for up to 3 months without cheese.