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–+ servings

Slow Cooker French Onion Soup

This cozy classic delivers rich, deeply savory flavor with a perfectly bubbly cheese topping. Let your slow cooker do the work for an effortlessly impressive bowl.
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Prep Time 20 minutes
Cook Time 9 hours
Total Time 9 hours 20 minutes
Course Soup
Cuisine French
Servings 6 servings
Calories 370 kcal

Equipment

  • slow cooker
  • oven-safe bowls

Ingredients
  

  • 4 large Yellow Onions, thinly sliced
  • 4 tbsp Unsalted Butter
  • 3 cloves Garlic, minced
  • 1 tsp Sugar
  • 1/2 cup Dry White Wine
  • 6 cups Beef Broth
  • 1 tbsp Worcestershire Sauce
  • 2 sprigs Fresh Thyme
  • 2 Bay Leaves
  • 1 tsp Salt
  • 1/2 tsp Black Pepper
  • 6 slices French Bread, about 1 inch thick
  • 2 cups Shredded Gruyere Cheese

Instructions
 

  • Place the sliced onions and butter in the slow cooker. Sprinkle with the sugar and toss to coat. Cover and cook on high for 1 hour, then stir well.
  • Continue cooking on high, uncovered, for another 3 to 4 hours, stirring occasionally, until the onions are deeply caramelized and golden brown.
  • Stir in the minced garlic and white wine. Cook for 5 minutes to let the wine reduce slightly.
  • Add the beef broth, worcestershire sauce, fresh thyme sprigs, bay leaves, salt, and black pepper. Cover and cook on low for 4 to 6 hours to let the flavors develop.
  • Remove and discard the thyme stems and bay leaves. Taste and adjust seasoning.
  • Ladle the soup into oven-safe bowls. Place a slice of french bread on top of each bowl and pile a generous amount of shredded gruyere cheese over the bread.
  • Set the bowls on a baking sheet and broil on high for 2 to 3 minutes, until the cheese is melted, bubbly, and golden brown on top. Serve immediately.

Nutrition

Serving: 1servingCalories: 370kcalCarbohydrates: 33gProtein: 19gFat: 18g
Keyword crockpot onion soup, easy French onion soup, slow cooker French onion soup, slow cooker soup recipe
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