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Slow Cooker French Onion Soup

Slow Cooker French Onion Soup

Onions and beef broth make the basis for this tasty and delicious soup topped with loads of cheese and French Bread.
Prep Time 30 mins
Cook Time 4 hrs
Total Time 4 hrs 30 mins
Course Main Dish
Cuisine American
Servings 6 People


  • 3 Large Yellow Onions peeled and sliced
  • 3 Tablespoons Unsalted Butter
  • 2 Tablespoons Light or Dark Brown Sugar
  • 2 Tablespoons Minced Garlic
  • 2 Tablespoons Worcestershire Sauce
  • 6 10.5oz Low Sodium Beef Broth
  • 1 Whole Bay Leaf
  • 1 Sprig Fresh Thyme
  • 6 Slices French Bread cut thick
  • 1 Cup Shredded Swiss Cheese
  • 1 Cup Shredded Parmesan Cheese


  • Peel and slice the onions into thin slices.
  • In a medium skillet add the butter, sliced onions and brown sugar and saute the onions until they become translucent and caramelized.
  • Add the cooked onions, beef broth, garlic, bay leaf and thyme to a 4 quart or larger crock-pot.
  • Cover and cook for 4 to 5 hours on LOW.
  • Add soup to ovenproof bowls and top with a slice or two of French bread.
  • Add both Swiss cheese and Parmesan cheese to top of bread.
  • Set the ovenproof bowls on a cookie sheet and place under the broiler for 1 to 2 minutes until the cheese is melted and bubbly.
  • Serve and enjoy!
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