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Slow Cooker French Onion Soup
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Slow Cooker French Onion Soup

This Slow Cooker French Onion Soup is one of those cozy meals that feels a little extra special without being complicated.
Course Soup
Cuisine Crockpot, Slow Cooker
Prep Time 10 minutes
Cook Time 8 hours
Total Time 8 hours 10 minutes
Servings 8
Calories 346kcal

Equipment

Ingredients

  • 3 pounds sweet onions sliced (about 10 cups)
  • ¼ cup butter cut into 8 pieces
  • 1 Tablespoon sugar
  • ½ cup dry red wine or red cooking wine
  • 8 cups beef broth
  • 4 springs fresh thyme
  • 2 bay leaves
  • 8 slices french bread
  • 8 oz Gruyere cheese freshly shredded

Instructions

  • Places butter pieces in the bottom of the crock pot. Top with onion slices and sugar
    sliced onions in slow cooker
  • Cook onions on high heat for 6 hours. The onions will caramelize and turn brown.
  • Add red wine and use a wooden spoon to scrape any stuck bits of onion from the bottom of the crock-pot.
    red wine being added to browned onions
  • Add beef broth, thyme, and bay leaves. Stir. Cook on HIGH for 2 hours or on LOW for 4 hours
    broth being poured into slow cooker
  • Preheat the broiler. Ladle soup into oven safe bowls. Top each bowl with a slice of french bread. Top the french bread with 1-1.5 oz freshly shredded gruyere.
    cheese added on top of bread
  • Places the bowls under the broiler for 3-5 minutes until the cheese is melted and starts to brown. Watch closely so that is doesn’t burn! Serve warm with more bread for dipping.
    two bowls of french onion soup

Nutrition

Calories: 346kcal | Carbohydrates: 51g | Protein: 20g | Fat: 17g | Saturated Fat: 10g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 5g | Trans Fat: 0.2g | Cholesterol: 46mg | Sodium: 1533mg | Potassium: 481mg | Fiber: 4g | Sugar: 12g | Vitamin A: 475IU | Vitamin C: 13mg | Calcium: 377mg | Iron: 3mg