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Crockpot French Onion Soup

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  • Author: Evelyn
  • Prep Time: 20 minutes
  • Cook Time: 6 to 8 hours (low) or 3 to 4 hours (high)
  • Total Time: 6 hours 20 minutes to 8 hours 20 minutes
  • Yield: 6 servings
  • Category: Soup
  • Method: Slow Cooker
  • Cuisine: French
  • Diet: Vegetarian

Description

Crockpot French Onion Soup is a rich, savory, and comforting dish featuring caramelized onions in a flavorful beef broth, topped with toasted bread and gooey melted cheese. Slow-cooked to perfection, it’s an easy way to enjoy a classic French favorite.


Ingredients

  • 6 large yellow onions, thinly sliced
  • 4 tablespoons butter
  • 3 cloves garlic, minced
  • 1/2 cup dry white wine or cooking sherry
  • 8 cups low-sodium beef broth
  • 1 tablespoon Worcestershire sauce
  • 1 bay leaf
  • 1 teaspoon fresh thyme or 1/2 teaspoon dried thyme
  • Salt and pepper to taste
  • 1 baguette or French bread, sliced and toasted
  • 2 cups shredded Gruyère or Swiss cheese

Instructions

  1. In a skillet over medium heat, melt the butter and add the sliced onions. Cook slowly, stirring occasionally, until onions are soft and deeply caramelized, about 30–40 minutes.
  2. Add the minced garlic and sauté for 1 minute until fragrant.
  3. Pour in the wine or sherry to deglaze the pan, scraping up browned bits.
  4. Transfer the onion mixture to a crockpot. Add beef broth, Worcestershire sauce, bay leaf, thyme, salt, and pepper.
  5. Cover and cook on low for 6 to 8 hours or high for 3 to 4 hours.
  6. Toast the baguette slices until crisp.
  7. Ladle soup into oven-safe bowls, top each with a toast slice, and sprinkle generously with shredded cheese.
  8. Place bowls under the broiler until the cheese is bubbly and golden brown. Serve hot.

Notes

  • Caramelizing onions slowly is crucial for developing rich flavor.
  • Use oven-safe bowls for broiling the cheese topping.
  • Substitute vegetable broth and vegan Worcestershire for a vegetarian version.
  • Freeze soup without bread and cheese for up to 3 months.

Nutrition

  • Serving Size: 1 bowl
  • Calories: 320
  • Sugar: 7g
  • Sodium: 820mg
  • Fat: 18g
  • Saturated Fat: 10g
  • Unsaturated Fat: 6g
  • Trans Fat: 0g
  • Carbohydrates: 28g
  • Fiber: 3g
  • Protein: 14g
  • Cholesterol: 45mg