French Onion Bake

Transform your favorite soup into a decadent, oven-baked delight with this irresistible French Onion Bake. This comforting dish features layers of caramelized yellow onions, fragrant with garlic and fresh thyme, simmered in a rich blend of dry white wine and broth for ultimate depth of flavor. Topped with golden toasted baguette slices, gooey Gruyère, and nutty Parmesan, this casserole-style creation is finished in the oven to bubbly, cheesy perfection. Ideal for cozy dinners or as an upscale side dish, this French Onion Bake combines the comforting soul of French onion soup with the indulgent allure of a gratin. Serve it warm and pair with a crisp green salad for a meal that’s irresistibly hearty yet refined. Perfect for fans of cheesy casseroles, French cuisine, and comfort food classics!

Nutriscore Rating: 63/100

Prep Time:20 mins

Cook Time:60 mins

Total Time:80 mins

Servings: 4

Ingredients

• 4 tablespoons Unsalted butter
• 4 large Yellow onions
• 1 teaspoon Sugar
• 3 minced Garlic cloves
• 1 teaspoon Fresh thyme leaves
• 2 tablespoons All-purpose flour
• 1 cup Dry white wine
• 2 cups Beef or vegetable broth
• 0.5 teaspoon Salt
• 0.5 teaspoon Black pepper
• 6 pieces Baguette slices
• 1.5 cups Gruyère cheese
• 0.5 cups Parmesan cheese

Directions

Step 1

Preheat your oven to 375°F (190°C).

Step 2

Peel and thinly slice the yellow onions into half-moons.

Step 3

In a large skillet, melt the butter over medium heat. Add the sliced onions and cook, stirring occasionally, until they soften, about 10 minutes.

Step 4

Sprinkle the onions with sugar to enhance caramelization. Continue cooking for another 20 minutes, stirring frequently, until the onions are deeply golden and caramelized.

Step 5

Add the minced garlic and thyme leaves to the skillet, cooking for 1 more minute until fragrant.

Step 6

Sprinkle the flour over the onions and stir well to coat. Let cook for 1-2 minutes to remove the raw flour taste.

Step 7

Pour in the white wine and stir to deglaze the pan, scraping up any browned bits from the bottom of the skillet. Let the mixture simmer until the wine reduces by half, about 3 minutes.

Step 8

Add the broth to the skillet. Stir well, and season with salt and pepper. Let the mixture simmer on low heat for 5-10 minutes until slightly thickened.

Step 9

Lightly toast the baguette slices under the broiler until golden on both sides.

Step 10

Transfer the onion mixture to a greased 8x8-inch (or similar-sized) baking dish. Arrange the toasted baguette slices on top of the onions.

Step 11

Sprinkle the Gruyère and Parmesan cheeses evenly over the bread slices and onion mixture.

Step 12

Bake in the preheated oven for 15-20 minutes, or until the cheese is melted, bubbling, and lightly golden.

Step 13

Allow the French Onion Bake to cool for 5 minutes before serving. Enjoy this dish warm with a side salad or on its own!

Nutrition Facts

Serving size	1833.4 grams (1833.4g)

Amount per serving	% Daily Value*
Calories	2448

Total Fat 129.90g	167%
Saturated Fat 75.40g	377%
Polyunsaturated Fat 3.40g
Cholesterol 386mg	129%
Sodium 5819mg	253%
Total Carbohydrate 181.60g	66%
Dietary Fiber 17.10g	61%
Total Sugars 33.10g
Protein 103.20g	206%

Vitamin D 48IU	238%
Calcium 2696mg	207%
Iron 10mg	53%
Potassium 1752mg	37%

*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: 50.6%

Protein: 17.9%

Carbs: 31.5%