Slow Cooker Onion Soup

French onion soup is simmered in the slow cooker, topped with croutons and provolone cheese, and broiled to bubbling perfection.

• Preparation Time: 15 mins
• Cooking Time: 4 hr
• Total Time: 4 hr 15 mins
• Calories: 498 Calories

Ingredients

• ¼ cup butter, melted
• 2 teaspoons Worcestershire sauce
• salt and ground black pepper to taste
• 2 cloves garlic, minced
• 3 tablespoons brandy
• 2 teaspoons soy sauce
• 4 cups beef stock
• 3 slices provolone cheese
• 1 large sweet onion (such as Vidalia®), cut into thin slivers
• 1 small red onion, cut into thin slivers
• 2 cups Italian-style seasoned croutons

Recipe Instructions

Step 1

Preheat the oven's broiler and set the oven rack about 6 inches from the heat source.

Step 2

Melt butter in a skillet over medium heat; cook and stir sweet onion and red onion in melted butter until softened, about 10 minutes. Cook and stir garlic into onion mixture until fragrant, about 2 minutes. Transfer to a slow cooker.

Step 3

Pour beef stock, brandy, soy sauce, and Worcestershire sauce into slow cooker. Season with salt and black pepper.

Step 4

Cook soup on High for 4 to 5 hours.

Step 5

Ladle the soup into 3 oven-proof bowls; top with croutons and a slice of Provolone per bowl.

Step 6

Broil in the preheated oven until cheese melts and begins to brown, about 3 minutes.