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French Onion Soup Casserole Recipe French Onion Soup Casserole Recipe

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French Onion Soup Casserole Recipe

This French Onion Soup Casserole is a cozy twist on the classic. Caramelized onions, beef broth, and gooey gruyere cheese meld perfectly over toasted bread. Comfort food at its finest!

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French Onion Soup Casserole is a comforting twist on the classic soup. Imagine the rich, caramelized onions mingling with savory beef broth, topped with crispy toasted French bread and gooey gruyere cheese. This dish brings all those flavors together in a hearty, satisfying bake. Perfect for a cozy night in, it’s easy to make and sure to impress. Let’s dive into this delicious recipe!

French Onion Soup Casserole Recipe

Ingredients:

  • 4 cups sliced onions
  • 2 tbsp butter
  • 1 tsp sugar
  • 1 tbsp flour
  • 4 cups beef broth
  • 1 cup shredded gruyere cheese
  • 4 slices toasted French bread

Instructions:

  1. Preheat oven to 350°F (175°C).
  2. In a large skillet, melt butter over medium heat. Add onions and sugar, cook until onions are caramelized, about 20 minutes.
  3. Sprinkle flour over onions and stir well. Gradually add beef broth, stirring constantly. Bring to a boil, then reduce heat and simmer for 10 minutes.
  4. Pour onion mixture into a baking dish. Top with toasted bread slices and sprinkle with shredded gruyere cheese.
  5. Bake in preheated oven for 15 minutes, or until cheese is melted and bubbly.
  6. Serve hot.

What You Will Need

What you will need to make French Onion Soup Casserole

  • Onions: Caramelized onions provide a rich, sweet flavor base essential for the depth and complexity of this comforting casserole.

  • Butter: Adds richness and helps caramelize the onions, giving the dish a smooth, velvety texture.

  • Sugar: Enhances the caramelization process, bringing out the natural sweetness of the onions.

  • Flour: Thickens the broth, creating a hearty consistency that holds the casserole together.

  • Beef broth: Provides a savory, umami-rich liquid that forms the backbone of the soup's flavor.

  • Gruyere cheese: Melts beautifully, adding a creamy, nutty topping that complements the savory onion mixture.

  • French bread: Toasted slices soak up the broth, adding texture and a satisfying crunch to each bite.

Tools and Instruments Required

What tools/instruments will be needed to make French Onion Soup Casserole

  • Skillet: Essential for caramelizing onions evenly, ensuring they develop a rich, sweet flavor.
  • Baking dish: Needed to bake the soup and bread together, melding flavors and textures.
  • Wooden spoon: Ideal for stirring onions and broth, preventing sticking and burning.
  • Oven: Crucial for baking the casserole, melting cheese, and achieving a bubbly top.
  • Knife: Necessary for slicing onions thinly and uniformly for even cooking.
french-onion-soup-casserole-recipe

French Onion Soup Casserole

A hearty and comforting casserole version of the classic French onion soup.
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Prep Time 15 mins
Cook Time 45 mins
Total Time 1 hr
Course Main Course
Cuisine French
Servings 6 servings
Calories 350 kcal

Equipment

  • Large skillet
  • Baking Dish
  • Oven

Ingredients:  

Main Ingredients

  • 4 cups sliced onions
  • 2 tbsp butter
  • 1 tsp sugar
  • 1 tbsp flour
  • 4 cups beef broth
  • 1 cup shredded Gruyere cheese
  • 4 slices French bread toasted

Instructions: 

  • Preheat oven to 350°F (175°C).
  • In a large skillet, melt butter over medium heat. Add onions and sugar, cook until onions are caramelized, about 20 minutes.
  • Sprinkle flour over onions and stir well. Gradually add beef broth, stirring constantly. Bring to a boil, then reduce heat and simmer for 10 minutes.
  • Pour onion mixture into a baking dish. Top with toasted bread slices and sprinkle with shredded Gruyere cheese.
  • Bake in preheated oven for 15 minutes, or until cheese is melted and bubbly.
  • Serve hot.

Notes:

For a richer flavor, use a mix of Gruyere and Swiss cheese.

Nutrition value:

Calories: 350kcalCarbohydrates: 30gProtein: 15gFat: 20gSaturated Fat: 12gCholesterol: 50mgSodium: 800mgPotassium: 300mgFiber: 3gSugar: 5gVitamin A: 500IUVitamin C: 10mgCalcium: 200mgIron: 2mg

Keywords:

Keyword Comfort Food
Tried this recipe?Let us know how it was!

Make Ahead and Freezing Instructions

Make Ahead Instructions

  1. Caramelize onions and prepare broth mixture as directed.
  2. Let the mixture cool completely.
  3. Store in an airtight container in the fridge for up to 2 days.
  4. When ready to bake, assemble with bread and cheese, then bake as directed.

Freezing Instructions

  1. Prepare the onion mixture and let it cool.
  2. Pour into a freezer-safe container, leaving space for expansion.
  3. Freeze for up to 3 months.
  4. Thaw in the fridge overnight before assembling with bread and cheese.
  5. Bake as directed once thawed.

For a deeper flavor, try adding a splash of sherry or white wine to the onions while they caramelize.

Frequently Asked Questions

FAQ:
How long does it take to caramelize the onions?
About 20 minutes.
Can I use a different type of cheese?
Yes, Swiss or mozzarella works too.
Is there a vegetarian option for the broth?
Substitute with vegetable broth.
Can I make this ahead of time?
Yes, prepare the onion mixture and assemble before baking.
What type of bread is best?
French bread or any crusty bread works well.

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