Slow Cooker Onion Soup Recipe

Slow Cooker Onion Soup Recipe

  • 1/4 cup butter, melted
  • 1 large sweet onion (such as Vidalia®), cut into thin slivers
  • 1 small red onion, cut into thin slivers
  • 2 cloves garlic, minced
  • 4 cups beef stock
  • 3 tablespoons brandy
  • 2 teaspoons soy sauce
  • 2 teaspoons Worcestershire sauce
  • salt and ground black pepper to taste
  • 2 cups Italian-style seasoned croutons
  • 3 slices provolone cheese
  1. 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.
  2. Pour beef stock, brandy, soy sauce, and Worcestershire sauce into slow cooker. Season with salt and black pepper.
  3. Cook soup on High for 4 to 5 hours.
  4. Preheat the oven's broiler and set the oven rack about 6 inches from the heat source.
  5. Ladle the soup into 3 oven-proof bowls; top with croutons and a slice of Provolone per bowl.
  6. Broil in the preheated oven until cheese melts and begins to brown, about 3 minutes.
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