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Simple Slow Cooker French Onion Soup
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4.35 from 23 votes

Simple Slow Cooker French Onion Soup

Onions are caramelized in the slow cooker, then combined with beef broth in this easy soup recipe. Topped off with toasted baguette slices and melted cheese, this simple soup is sure to become a family favorite.
Prep Time20 minutes
Cook Time8 hours
Total Time8 hours 20 minutes
Course: Soups
Cuisine: French
Servings: 8 -10 servings
Calories: 455kcal
Author: Danelle

Ingredients

  • 1/4 cup butter softened
  • 6-8 sprigs fresh thyme
  • 1 bay leaf
  • 5-6 large yellow onions thinly sliced
  • 1 tablespoon sugar
  • 8 cups low-sodium beef broth
  • 1 tablespoon Worcestershire sauce
  • 1 teaspoon salt
  • 1 teaspoon pepper
  • 1 small baguette sliced
  • 4-6 ounces Gruyere cheese shredded

Instructions

  • Place butter, thyme, bay leaf and sliced onions in a lightly greased slow cooker. Stir to combine, then sprinkle with sugar. Cover and cook on high for 6-8 hours, or until onions are soft and dark golden brown. Stir occasionally during cooking.
  • Discard thyme sprigs and bay leaf. Add beef broth, Worcestershire sauce, salt and pepper. Cover and cook on high for 30-60 more minutes.
  • Preheat broiler. Arrange baguette slices on a large baking sheet. Top with shredded cheese. Broil for about 2 minutes, or until cheese melts and beings to turn golden.

Nutrition

Serving: 1g | Calories: 455kcal | Carbohydrates: 29g | Protein: 22g | Fat: 28g | Saturated Fat: 16g | Polyunsaturated Fat: 9g | Trans Fat: 1g | Cholesterol: 80mg | Sodium: 1301mg | Fiber: 2g | Sugar: 7g