How to Make French Onion Soup in the Slow Cooker: Start to Finish

How to make French onion soup in the slow cooker is your answer to a deeply flavorful, hands-off meal that fills your home with the irresistible aroma of caramelized onions and savory broth. Imagine tender onions cooked to golden perfection, swimming in a rich, halal beef broth, and topped with melted cheese bubbling over a crusty baguette slice. This dish is the ultimate comforting, hearty bowl that comes together with minimal effort.

For more ideas, check out our slow cooker garlic butter beef.

You might also enjoy our slow cooker garlic butter beef.

Table of Contents

• Why This Recipe Works
• Everything You Need for This Recipe
• Step-by-Step Instructions
• Serving and Pairing Ideas
• Storage and Reheating Tips
• Common Mistakes to Avoid
• A Brief History of French Onion Soup

Why This Recipe Works

Essential CookwareCrock-Pot 7-Quart Manual Slow Cooker

Perfect for making French onion soup with a large capacity for family meals.

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• **Effortless yet decadent:** This slow cooker method lets you enjoy rich, caramelized flavors without hovering over the stove for hours.
• **Family-friendly:** The sweet caramelized onions and broiled cheesy topping make it a hit even with picky eaters.
• **Customizable:** Adjust bro->>..
  
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  How to Make French Onion Soup in the Slow Cooker

  Prep Time 30 minutes minutes

  Cook Time 8 hours hours

  Total Time 8 hours hours 30 minutes minutes

  Servings 6 servings

  Calories 350

  This slow cooker French onion soup is a comforting and flavorful dish, perfect for chilly days.

  Ingredients

  • 4 large yellow onions (thinly sliced)
  • 4 tbsp unsalted butter
  • 1 tbsp olive oil
  • 1 tsp sugar
  • 4 cloves garlic (minced)
  • 8 cups halal beef broth
  • 2 cups water
  • 1 tbsp soy sauce (or halal Worcestershire sauce)
  • 1 tsp dried thyme
  • 1 bay leaf
  • salt (to taste)
  • pepper (to taste)
  • 1 French baguette (sliced)
  • 2 cups shredded halal cheese (such as Gruyère or Swiss)

  Instructions 

  • In a large skillet, melt the butter and olive oil over medium heat.
  • Add the sliced onions and sugar, cooking until the onions are caramelized, about 20-25 minutes, stirring frequently.
  • Once caramelized, add the minced garlic and cook for an additional 1-2 minutes until fragrant.
  • Transfer the caramelized onions and garlic to the slow cooker.
  • Pour in the halal beef broth and water, followed by the soy sauce, dried thyme, bay leaf, salt, and pepper. Stir to combine.
  • Cover and cook on low for 6-8 hours or on high for 3-4 hours.
  • About 30 minutes before serving, preheat your oven to broil.
  • Ladle the soup into oven-safe bowls, top each with a slice of baguette, and sprinkle generously with shredded cheese.
  • Place the bowls on a baking sheet and broil in the oven until the cheese is bubbly and golden, about 3-5 minutes.
  • Carefully remove from the oven and let cool slightly before serving.

  Notes

  For a vegetarian version, use vegetable broth instead of beef broth.

  Calories: 350kcal

  Cost: $15

  Course: Soup

  Cuisine: French

  Keyword: French onion soup

  

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