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Slow Cooker French Onion Soup

Slow Cooker French Onion Soup Recipe

Slow Cooker French Onion Soup is the classic onion soup recipe done in your crock pot! 

Course Main Course
Cuisine French
Keyword Slow Cooker French Onion Soup Recipe
Prep Time 35 minutes
Cook Time 8 hours
Total Time 8 hours 35 minutes
Servings 16
Calories 320 kcal

Ingredients

  • 6 lbs onions sliced
  • 1 ⁄4 cup butter
  • 14 cups beef stock
  • 1 ⁄2 teaspoon Worcestershire sauce
  • 1 bay leaf
  • 1 ⁄4 teaspoon thyme
  • salt and pepper

FOR 2 SERVINGS

  • 2 tablespoons sherry wine optional
  • 2 slices toasted crusty bread
  • 2 tablespoons grated Parmesan cheese
  • 1 ⁄4 cup shredded Gruyere cheese

Instructions

  1. Over medium heat saute the onion in butter until soft and translucent and caramel color. Make this in 3 batches.
  2. Place onions in slow cooker.
  3. Deglaze cooking skillet with some of the beef stock; this is the secret to that taste.
  4. Add to slow cooker along with the remaining beef broth (your own homemade or powdered mixed with boiling water).
  5. Add Worcestershire sauce, thyme and bay leaf.
  6. Cover; cook on High for 4 hours or on low for 6-8 hours.
  7. Add salt and pepper to taste. Remove bay leaf.
  8. Divide soup into appropriate containers.
  9. Seal and freeze.
  10. When ready to enjoy your French Onion Soup.
  11. Remove from freezer and place in a microwave dish with 2 tbsp sherry; heat for 5 minutes.
  12. Add Parmesan cheese to your onion soup bowl. Place one slice of toasted bread over the cheese. Fill bowl with soup.
  13. Top with shredded Gruyère cheese.
  14. Place under broiler to melt your cheese.