french onion soup casserole recipe

Written BySheba G Updated On
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The Best french onion soup casserole recipe

I love this french onion soup casserole recipe because it takes all the rich, savory flavors of classic french onion soup and turns it into a hearty, family friendly dish. My kids go crazy for the gooey melted cheese and tender onions, and I love that I can serve it as a main course or a side dish. It is perfect for busy weeknights when you want something comforting but also a little special. The onions are packed with antioxidants and fiber, and using a good quality broth keeps the sodium in check, so I feel good about serving it to my family. This casserole has become a staple in our home, especially during the cooler months, and it always gets rave reviews at potlucks and family gatherings.

French Onion Soup Casserole

4.9 from 1811 votes

This french onion soup casserole combines the deep, caramelized onion flavor of the classic soup with a cheesy, bubbly topping. It is a simple, one dish meal that is perfect for a cozy dinner.

Prep Time20 mins
Cook Time40 mins
Resting Time0 mins
Total Time60 mins
Servings: 6Cuisine: InternationalCalories: 420 kcal

🥘Ingredients

For the Onion Base

4 large yellow onions, thinly sliced
3 tablespoons butter
1 tablespoon olive oil
1 teaspoon salt
1/2 teaspoon black pepper
1 teaspoon sugar
1/2 cup dry sherry or white wine
4 cups beef broth
1 tablespoon fresh thyme leaves

For the Casserole

1 loaf French bread, cut into 1 inch cubes
2 cups shredded Gruyere cheese
1 cup shredded mozzarella cheese
1/2 cup grated Parmesan cheese

👨‍🍳Directions

1Preheat oven to 375 degrees F.
2In a large skillet over medium heat, melt butter with olive oil. Add sliced onions, salt, pepper, and sugar. Cook, stirring often, for 25 to 30 minutes until onions are deeply caramelized and golden brown.
3Pour in the sherry or white wine and scrape up any browned bits from the bottom of the pan. Cook for 2 minutes until the liquid is mostly evaporated.
4Add the beef broth and thyme. Bring to a simmer and cook for 10 minutes, allowing the flavors to meld. Remove from heat.
5Spread half of the bread cubes in the bottom of the baking dish. Pour half of the onion mixture over the bread. Sprinkle with half of the Gruyere and mozzarella cheeses. Repeat with remaining bread, onion mixture, and cheeses. Top with Parmesan.
6Bake for 20 minutes until the cheese is melted and bubbly and the bread is golden and crisp. Let rest for 5 minutes before serving.

🔧Equipment

Large skillet or Dutch oven
9×13 inch baking dish
Chef’s knife
Cutting board
Wooden spoon

📊Nutrition Facts (per serving)

🔥Calories: 420 kcal🧈Total Fat: 22g💛Saturated Fat: 12g❤️Cholesterol: 65mg🧂Sodium: 980mg🌾Total Carbs: 35g🥦Dietary Fiber: 3g🍬Sugars: 8g🥩Protein: 20g

📝Notes

For a lighter version, use low sodium beef broth and reduce the cheese by half. You can also add a cup of sliced mushrooms to the onions for extra flavor.

Watch Video Of How French Onion Soup Casserole Works

This french onion soup casserole is always a good idea for any occasion, from a simple weeknight dinner to a holiday gathering. It is a crowd pleaser that brings everyone to the table, and I love that I can make it with ingredients I usually have on hand. Give it a try and I am sure it will become a favorite in your home too.

❓ Frequently Asked Questions About French Onion Soup Casserole

1. Can I make this french onion soup casserole ahead of time?

Yes, you can assemble the casserole up to a day in advance. Cover it tightly and refrigerate. When ready to bake, add about 10 minutes to the baking time to ensure it is heated through.

2. What is the best cheese for french onion soup casserole?

Gruyere is the classic choice for its nutty flavor and excellent melting qualities. You can also use Swiss cheese or a mix of provolone and mozzarella for a similar result.

3. Can I use a different type of bread?

Absolutely. A sturdy bread like sourdough or a crusty Italian loaf works well. Avoid soft sandwich bread as it will become too soggy.

4. How do I store leftovers?

Store any leftover casserole in an airtight container in the refrigerator for up to 3 days. Reheat in the oven at 350 degrees F until warmed through, or in the microwave for a quick option.

5. Can I make this recipe vegetarian?

Yes, simply substitute the beef broth with a good quality vegetable broth. The flavor will be slightly different but still delicious.

Hi, I’m Sheba G, the creator behind **Sheba’s Recipe**, where I share my favorite homemade dishes and easy recipes anyone can try. I love experimenting in the kitchen and helping others enjoy simple, flavorful meals with confidence.

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