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Slow Cooker French Onion Soup

A savory celebration of caramelized onions, flavorful broth, and toasty bread topped with bubbling cheese, perfect for chilly evenings.
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Prep Time 15 minutes
Cook Time 7 hours
Total Time 7 hours 15 minutes
Servings: 6 servings
Course: Main Course, Soup
Cuisine: French
Calories: 250
Ingredients Method Notes

Ingredients
  

For the Soup
  • 4 large onions, thinly sliced Brown or yellow onions work best, sweet onions can be added.
  • 4 cups beef broth Ensure Halal-certified.
  • 2 tablespoons butter Used for sautéing onions.
  • 2 teaspoons sugar Enhances sweetness of the onions.
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper
  • 1 teaspoon thyme Adds depth to the flavor.
For Serving
  • 1 baguette sliced Toasted for topping.
  • 1 cup Grated Gruyere cheese Ensure Halal-certified; can substitute with Mozzarella and Parmesan.

Method
 

Preparation
  1. Thinly slice the onions using a sharp knife to ensure even caramelization.
Cooking
  1. In the slow cooker, melt the butter and add the sliced onions. Stir to coat.
  2. Sprinkle sugar, salt, pepper, and thyme over the onions.
  3. Cover and set the slow cooker to low for about 6-8 hours.
  4. After cooking, add the beef broth and stir. Cover and cook for an additional hour on low.
Serving
  1. Preheat the oven to broil. Slice the baguette and toast the pieces on a baking sheet until golden brown.
  2. Ladle the hot soup into bowls, top with a slice of toasted baguette and generous grated Gruyere cheese.
  3. Optional: Place under the broiler for a minute to melt and brown the cheese.

Notes

Leftovers can be refrigerated in an airtight container for up to 3 days or frozen for up to 3 months. Thaw overnight in the fridge and reheat on the stove.