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Slow Cooker French Onion Soup

There’s something undeniably comforting about a warm bowl of French onion soup. Its deep, savory flavor, sweet caramelized onions, and rich broth make it a timeless classic that never fails to satisfy. Not only does this method free up your stovetop, but it also allows the flavors to develop slowly, giving you a perfectly balanced soup with minimal effort.
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Course: Appetizer, Side Dish, Soup
Cuisine: American
Ingredients Method

Ingredients
  

  • 4 large onions thinly sliced
  • 2 tablespoons butter
  • 1 teaspoon sugar
  • 1½ teaspoons salt
  • 2 quarts beef broth no sodium added
  • ¼ cup sherry
  • 2 sprigs fresh thyme
  • Pepper to taste
  • Sliced bread or croutons
  • 8 ounces Gruyère cheese sliced (or Swiss cheese)

Method
 

  1. Place the sliced onions, butter, sugar, and salt in the bottom of a 6-quart slow cooker. Stir to coat the onions evenly.
  2. Cover and cook on high for 7 hours, stirring occasionally if possible, until the onions are soft, deeply browned, and caramelized.
  3. Add the beef broth, sherry, thyme sprigs, and pepper to taste. Stir gently, then cover and cook on high for an additional 1 hour to allow the flavors to meld.
  4. When ready to serve, ladle the soup into oven-safe bowls. Top each bowl with slices of bread or croutons.
  5. Place sliced Gruyère cheese on top of the bread. For a melted, bubbly topping, broil the bowls in the oven for 2–4 minutes until the cheese is golden and melted.
  6. Carefully remove from the oven and serve hot.
  7. Enjoy!