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French Onion Soup

A rich and savory French onion soup loaded with caramelized onions, tender chicken, toasted French bread, and melted cheese. This comforting baked soup is hearty, flavorful, and perfect for cozy dinners.
Print Recipe
Prep Time 20 minutes
Cook Time 35 minutes
Total Time 55 minutes
Servings: 6 servings
Course: Baked Dishes, Comfort Food, Family Favorites, Main Course, Soup
Cuisine: French
Calories: 470
Ingredients Method Notes

Ingredients
  

  • 1/2 cup butter divided
  • 6 cups sweet onions thinly sliced
  • 2 tsp garlic finely chopped
  • 4 tsp fresh thyme leaves divided
  • 1/4 tsp salt
  • 1/4 tsp black pepper
  • 1 cup beef flavored broth
  • 3 cups cooked chicken breast shredded
  • 12 slices French bread 1/2-inch thick
  • 2 cups Swiss or mozzarella cheese shredded

Method
 

  1. Preheat oven to 375°F.
  2. In a 12-inch ovenproof skillet, melt 1/4 cup butter over medium-high heat. Add onions, garlic, 3 teaspoons thyme, salt, and pepper.
  3. Cook 9–10 minutes, stirring occasionally, until onions begin to brown. Reduce heat to medium and continue cooking 10–12 minutes until caramelized.
  4. Stir in broth and shredded chicken. Bring mixture to a simmer, then remove from heat.
  5. Melt remaining butter and brush both sides of bread slices. Arrange on a baking sheet and toast 8–10 minutes until lightly browned.
  6. Place toasted bread slices over soup mixture in skillet and top evenly with shredded cheese.
  7. Bake uncovered for 10–12 minutes until cheese is melted and bubbly. Sprinkle with remaining thyme before serving.

Notes

Gruyère cheese can be used for a more traditional flavor. Serve hot with extra toasted bread on the side.