Mouthwatering French Onion Soup recipe makes a comforting, classic bowl of soup with caramelized onions in rich soup and crusty bread with melty, delicious cheese! A rustic yet elegant favorite for entertaining! Includes stovetop and slow cooker methods!
Add onions, butter and salt to large Dutch oven with olive oil set on low heat until the onions are browned and caramelized, about 1 hour. Add garlic and heat thoroughly, about one minute. Pour in beef stock and chicken stock. Stir, cover and allow to simmer over low heat for 30 minutes.
When ready to serve, ladle soup into oven proof bowls and top with bread and cheeses. Place on lined baking sheet and under the broiler in the oven until the cheeses have melted and browned lightly, about 8 minutes.
Slow Cooker French Onion Soup Recipe:
Add onions, butter and salt to slow cooker. Cook on low setting for 10 hours.
Add garlic, beef stock, and chicken stock. Stir well to combine and cook on low setting for 8 hours.
When ready to serve, ladle soup into oven proof bowls and top with bread and cheeses. Place on lined baking sheet and under the broiler in the oven until the cheeses have melted and browned lightly, about 8 minutes.
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How to Make Ahead and Freeze French Onion Soup
To make ahead: Cook French Onion Soup as directed and ladle it into oven-proof bowls. Allow soup to cool and cover the bowls and place them into the refrigerator for up to 3 days. When ready to serve, preheat the oven, remove the soup from the refrigerator, and place it into the oven to reheat the soups for 15 minutes. Remove from the oven and top with bread and grated cheeses. Return to the oven and bake as directed. To freeze: Make the soup without adding the bread and cheese. Allow soup to cool, then transfer to a freezer-safe container and freeze for up to 3 months. To serve, thaw in the refrigerator overnight and then proceed with the recipe as written. If you freeze the soup in individual portions, you can thaw and reheat only what you need.