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crock pot french onion soup

This comforting crock pot French onion soup is rich and flavorful, featuring caramelized onions simmered in a savory broth, topped with melted cheese and toasted bread. It’s simple to prepare and perfect for a hearty meal that warms you up.
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Prep Time 15 minutes
Cook Time 8 hours
Total Time 8 hours 15 minutes
Course Soup
Cuisine French
Servings 4 People
Calories 250 kcal

Equipment

  • 1 Crock pot
  • 1 Cutting board
  • 1 Wooden spoon
  • 1 Ladle
  • 4 Oven-safe bowls for serving
  • 1 Broiler for toasting cheese

Ingredients
  

  • 4 large onions, thinly sliced
  • 4 tablespoons unsalted butter
  • 1 tablespoon olive oil
  • 4 cups beef broth
  • 1 cup dry white wine
  • 2 teaspoons fresh thyme leaves or 1 teaspoon dried thyme
  • to taste salt
  • to taste pepper
  • 6 slices French baguette
  • 2 cups shredded Gruyère cheese or mozzarella cheese
  • 1 tablespoon Worcestershire sauce optional

Instructions
 

  • In a skillet over medium heat, add the butter and olive oil. Once melted, add the sliced onions. Cook for about 10-15 minutes until softened and translucent, stirring occasionally.
  • Transfer the caramelized onions to the crock pot. Add the beef broth, dry white wine, thyme, Worcestershire sauce (if using), salt, and pepper. Stir to combine.
  • Cover the crock pot and set it to low heat. Cook for 8 hours, allowing the flavors to meld together.
  • Once the cooking time is complete, taste the soup and adjust seasoning if necessary.
  • Preheat your broiler. While the soup is heating in the crock pot, toast the slices of French baguette until golden brown.
  • Ladle the soup into oven-safe bowls, place a slice of toasted baguette on top of each bowl, and sprinkle with shredded Gruyère cheese.
  • Place the bowls under the broiler for a few minutes, until the cheese is bubbly and golden brown. Keep a close eye to prevent burning.
  • Carefully remove the bowls from the oven and let them cool slightly before serving.

Notes

You can make this soup ahead of time and refrigerate it. Reheat before serving.
Feel free to add additional herbs like bay leaves or parsley for extra flavor.
This soup pairs wonderfully with a light salad or as a starter before the main course.