How to Make Slow Cooker Onion Soup - A Step-by-Step Guide

Slow cooker onion soup is a comforting and flavorful dish that is perfect for a cozy night in. This soup is packed with the rich, savory flavors of caramelized onions and beef broth, and it's all made easy thanks to the magic of the slow cooker. Whether you're looking for a simple weeknight meal or a delicious appetizer for a dinner party, this slow cooker onion soup is sure to be a hit.

One of the best parts of this recipe is the minimal prep work. All you need to do is slice up a bu...

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Ingredients

  • ¼ 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

Information

  • Prep Time: 15 mins
  • Cook Time: 4 hrs 15 mins
  • Total Time: 4 hrs 30 mins
  • Servings: 3
  • Yield: 3 servings

  • 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.
  • Pour beef stock, brandy, soy sauce, and Worcestershire sauce into slow cooker. Season with salt and black pepper.
  • Cook soup on High for 4 to 5 hours.
  • Preheat the oven's broiler and set the oven rack about 6 inches from the heat source.
  • Ladle the soup into 3 oven-proof bowls; top with croutons and a slice of Provolone per bowl.
  • Broil in the preheated oven until cheese melts and begins to brown, about 3 minutes.
  • Nutrition

    498 cal.

    • Total Fat: 29g
    • Saturated Fat: 16g
    • Cholesterol: 62mg
    • Sodium: 1044mg
    • Total Carbohydrate: 31g
    • Dietary Fiber: 3g
    • Total Sugars: 9g
    • Protein: 17g
    • Vitamin C: 26mg
    • Calcium: 292mg
    • Iron: 2mg
    • Potassium: 448mg