Description
A classic French Onion Soup made effortlessly in a crockpot. This recipe features deeply caramelized onions simmered in a rich Beef broth with aromatic herbs, topped with crusty French bread and a melty blend of Gruyere, Emmental, and Parmesan cheeses. Perfect for a comforting and elegant meal.
Ingredients
Scale
Soup Ingredients
- 3 large white onions, sliced
- 3 tablespoons butter
- 64 ounces beef broth (reduced sodium preferred)
- 1 tablespoon Worcestershire sauce
- 1 clove garlic, minced
- ⅓ cup dry sherry
- 4 sprigs fresh thyme (or 1 teaspoon dried thyme)
- 1 bay leaf
Toppings
- 8 slices French bread (stale or dry is best)
- ¾ cup shredded Gruyere cheese
- ½ cup shredded Emmental cheese
- 6 tablespoons shredded Parmesan cheese
Instructions
- Caramelize Onions: In a large non-stick pan, melt the butter over medium-low heat. Add the sliced onions and cook slowly, stirring occasionally, until golden and caramelized, about 20 minutes. This slow cooking draws out their natural sweetness and deep flavor.
- Prepare Slow Cooker: Transfer the caramelized onions to your crockpot. Add the beef broth, Worcestershire sauce, minced garlic, dry sherry, thyme sprigs, and bay leaf to the slow cooker. Stir gently to combine all ingredients.
- Slow Cook the Soup: Cover and cook on low heat for 6 to 8 hours. This slow simmer develops the rich, robust flavors characteristic of French Onion Soup.
- Remove Bay Leaf: Once cooking is complete, carefully remove and discard the bay leaf before serving.
- Assemble and Broil: Ladle the hot soup into oven-safe bowls. Place a slice of dry French bread on top of each bowl and evenly sprinkle with the Gruyere, Emmental, and Parmesan cheeses. Place the bowls under a broiler for 2 to 3 minutes until the cheese is melted, bubbly, and lightly browned.
Notes
- This crockpot French Onion Soup is a comforting, hearty meal perfect for cooler days.
- Using stale or dry French bread helps it hold up well when broiled in the soup without becoming soggy.
- For a richer flavor, choose good quality beef broth and freshly grated cheeses.
- If you don’t have a broiler, you can also toast the bread separately and add cheese before placing it on top to melt in the slow cooker during the last 10 minutes.
Nutrition
- Serving Size: 1 serving
- Calories: 367 kcal
- Sugar: 7 g
- Sodium: 920 mg
- Fat: 12 g
- Saturated Fat: 7 g
- Unsaturated Fat: 4 g
- Trans Fat: 1 g
- Carbohydrates: 44 g
- Fiber: 2 g
- Protein: 19 g
- Cholesterol: 34 mg
