A rich and flavorful French onion soup made easy in the crockpot. This recipe delivers deep caramelized onion flavor with minimal effort.
Author:Oliver
Prep Time:25 minutes
Cook Time:6 hours
Total Time:6 hours 25 minutes
Yield:6 servings 1x
Category:Soup
Method:Slow Cooker
Cuisine:French
Diet:Low Lactose
Ingredients
Scale
5 large yellow onions, thinly sliced
4 tbsp unsalted butter
1 tsp sugar
1/2 tsp salt
1/4 tsp black pepper
2 cloves garlic, minced
6 cups beef broth
1/2 cup dry white wine
1 tbsp Worcestershire sauce
1 bay leaf
1/2 tsp dried thyme
1 French baguette, sliced
1 1/2 cups grated Gruyère cheese
Instructions
Melt butter in a large skillet over medium heat. Add onions, sugar, salt, and pepper. Cook for 20 minutes until deeply caramelized, stirring occasionally.
Add garlic and cook for 1 minute until fragrant.
Transfer onion mixture to crockpot. Add beef broth, wine, Worcestershire sauce, bay leaf, and thyme.
Cover and cook on LOW for 6-8 hours or HIGH for 3-4 hours.
Before serving, toast baguette slices. Ladle soup into oven-safe bowls, top with toast and cheese.
Broil for 2-3 minutes until cheese melts and bubbles.