French Onion Casserole

Transform the classic flavors of French onion soup into a comforting, cheesy masterpiece with this French Onion Casserole. Caramelized yellow onions are the heart of this dish, enhanced with a splash of dry white wine, rich beef broth, and fragrant thyme for depth of flavor. Layered with golden cubes of French bread and a lavish blend of Gruyère and mozzarella cheeses, this savory casserole is baked to perfection, offering a bubbling, crispy top that’s impossible to resist. Perfect for cozy family dinners or as a show-stopping side dish, this recipe is both hearty and elegant. Ready in just over an hour, it’s an irresistible twist on a time-honored favorite.

Nutriscore Rating: 65/100

Prep Time:20 mins

Cook Time:60 mins

Total Time:80 mins

Servings: 6

Ingredients

• 4 tablespoons unsalted butter
• 4 large yellow onions
• 1 teaspoon granulated sugar
• 3 cloves garlic cloves
• 2.5 cups beef broth
• 0.5 cups dry white wine
• 1 teaspoon fresh thyme leaves
• 1 leaf bay leaf
• 4 cups French bread, sliced and cubed
• 1.5 cups shredded Gruyère cheese
• 1 cup shredded mozzarella cheese
• 1 tablespoon olive oil
• 1 teaspoon salt
• 0.5 teaspoons black pepper

Directions

Step 1

Preheat your oven to 375°F (190°C).

Step 2

Peel and slice the yellow onions into thin rings. Mince the garlic cloves.

Step 3

In a large skillet, melt the butter over medium heat. Add the sliced onions and stir to coat them in the butter.

Step 4

Reduce the heat to medium-low. Sprinkle the sugar over the onions and cook for 30-35 minutes, stirring occasionally, until the onions are deeply caramelized and golden brown.

Step 5

Add the minced garlic to the skillet and cook for 1-2 more minutes, until fragrant.

Step 6

Pour in the beef broth and white wine. Stir in the thyme leaves and add the bay leaf. Bring the mixture to a simmer and cook for 5 minutes to combine the flavors. Remove the bay leaf before proceeding.

Step 7

Grease a 9x13-inch baking dish with olive oil. Spread half of the cubed French bread across the bottom of the dish.

Step 8

Spoon half of the caramelized onion mixture over the bread. Top with half of the shredded Gruyère and mozzarella cheeses.

Step 9

Layer the remaining cubed bread, followed by the rest of the onion mixture and cheeses.

Step 10

Season the top with salt and black pepper.

Step 11

Cover the dish with aluminum foil and bake in the preheated oven for 20 minutes.

Step 12

Remove the foil and bake for an additional 15 minutes, or until the top is bubbly and golden brown.

Step 13

Let cool for 5-10 minutes before serving. Enjoy your savory French Onion Casserole!

Nutrition Facts

Serving size	2634.7 grams (2634.7g)

Amount per serving	% Daily Value*
Calories	4469

Total Fat 158.80g	204%
Saturated Fat 84.50g	422%
Polyunsaturated Fat 1.40g
Cholesterol 384mg	128%
Sodium 9070mg	394%
Total Carbohydrate 539.10g	196%
Dietary Fiber 27.90g	100%
Total Sugars 64.30g
Protein 174.20g	348%

Vitamin D 36IU	180%
Calcium 2846mg	219%
Iron 29mg	159%
Potassium 2307mg	49%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 33.4%

Protein: 16.3%

Carbs: 50.4%