How to Make French Onion Soup Casserole - A Step-by-Step Guide

French Onion Soup Casserole is a delicious and comforting dish that is perfect for a cozy night at home. This recipe takes the classic flavors of French onion soup and transforms them into a satisfying casserole that is sure to please the whole family.

The dish starts with a base of caramelized onions, which are cooked low and slow until they are soft, sweet, and deeply flavorful. The onions are then combined with a rich and savory broth, and topped with crusty bread and melted cheese...

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Ingredients

  • 5 tablespoons salted butter, divided
  • 4 medium onions, chopped
  • 2 tablespoons all-purpose flour
  • 1 pinch ground black pepper
  • ¾ cup beef broth
  • ¼ cup dry sherry
  • 1 ½ cups plain croutons
  • ½ cup shredded Swiss cheese
  • 3 tablespoons grated Parmesan cheese

Information

  • Prep Time: 15 mins
  • Cook Time: 15 mins
  • Total Time: 30 mins
  • Servings: 6
  • Yield: 6 servings

  • Set an oven rack about 6 inches from the heat source and preheat the oven's broiler.
  • Heat 3 tablespoons of butter in a pot over medium-high heat. Cook onions in the hot butter until tender, 5 to 7 minutes. Blend in flour and pepper. Add broth and sherry; cook and stir until thickened and bubbly. Pour into a 1-quart casserole dish.
  • Melt remaining 2 tablespoons butter and toss with croutons. Spoon over onion mixture. Sprinkle with Swiss and Parmesan cheeses.
  • Place under the preheated broiler just until cheeses melt, about 5 minutes. Serve immediately.
  • Nutrition

    254 cal.

    • Total Fat: 17g
    • Saturated Fat: 10g
    • Cholesterol: 46mg
    • Sodium: 359mg
    • Total Carbohydrate: 17g
    • Dietary Fiber: 2g
    • Total Sugars: 4g
    • Protein: 9g
    • Vitamin C: 6mg
    • Calcium: 218mg
    • Iron: 1mg
    • Potassium: 165mg