Easy Slow Cooker French Onion Soup
Recipe Type: Main
Let your slow cooker do most of the work for you when it comes to this slow cooker French onion soup. At the end, top it off with bread and cheese for a good broil and you are ready to eat.
  • 3 lbs white onions, sliced
  • 8 tablespoons unsalted butter
  • 1 teaspoon salt
  • 8 cups beef broth
  • 1 tablespoon Worcestershire
  • ¼ cup white wine (or white cooking wine)
  • 1 tablespoon red wine vinegar
  • 4 sprigs thyme, plus additional thyme for topping
  • Loaf of Italian bread, cut into ¾” slices, for topping
  • 2 cups shredded Gruyere cheese
  1. Place onions, butter, and salt in large slow cooker.
  2. Cook on low for 8-10 hours. This works best if you do it overnight.
  3. In the morning, add beef broth, Worcestershire, wine, red wine vinegar, and thyme.
  4. Season with salt and pepper, to taste.
  5. Cover and cook on low for another 6-8 hours.
  6. After 6-8 hours, preheat oven to 350 degrees F. Place oven proof bowls onto baking sheet.
  7. Ladle soup into oven proof bowls.
  8. Top with 1-2 slices of bread and top each bowl with ~1/4 cup of shredded cheese.
  9. Bake in preheated oven for 20 minutes.
  10. Turn on broiler and broil until golden brown, keeping a very close eye on it.
  11. Garnish with additional thyme leaves.
Recipe by Honest Cooking by Mercato Fabbrica at https://honestcooking.com/easy-slow-cooker-french-onion-soup/