Go Back

Crockpot French Onion Soup

A rich and golden French onion soup made effortlessly in a slow cooker, perfect for cozy nights.
Print Recipe Pin Recipe
Prep Time 30 minutes
Cook Time 10 hours
Total Time 10 hours 30 minutes
Servings: 6 servings
Course: Appetizer, Soup
Cuisine: French
Calories: 290
Ingredients Method Notes

Ingredients
  

For the Soup Base
  • 6 large yellow onions Sliced thinly
  • 2 tablespoons olive oil For sweating the onions
  • 4 cups beef broth Use high-quality broth
  • 2 tablespoons Worcestershire sauce Adds depth of flavor
  • 1 teaspoon thyme Dried thyme preferred
  • 1 teaspoon salt Adjust to taste
  • 4 cloves garlic Added in the last hour of cooking
For Toppings
  • 6 slices crusty bread Preferably toasted
  • 2 cups Gruyère cheese Grated, for melting on top

Method
 

Preparation
  1. Slice the yellow onions thinly and layer them in the crockpot.
  2. Drizzle with olive oil, cover, and set the slow cooker to low. Let the onions sweat for about 8-10 hours until sweet and golden.
Cooking
  1. During the last hour, add minced garlic and stir to combine.
  2. Pour in the beef broth, add Worcestershire sauce, thyme, and salt. Stir well and let cook on low until the flavors are melded together.
Serving
  1. Ladle the soup into bowls, top with toasted bread and a generous sprinkle of grated Gruyère cheese.
  2. If desired, place under the broiler to melt the cheese until bubbly and golden.

Notes

Soup can be frozen without bread and cheese. Store in the fridge for 3-4 days. The flavors improve the next day.