French Onion Casserole
A savory casserole layered with tender caramelized onions, melted Swiss cheese, and buttery French bread, perfect for comforting family dinners or casual gatherings.
Ingredients
Instructions
- Peel and slice onions 1/4-inch thick.
- Saute onions in butter until tender.
- Spoon onions into an 11 x 7-inch glass dish.
- Spread grated Swiss cheese over the onions.
- Top with slices of French bread, buttered.
- Bake until cheese is melted and bubbly.
Tips & Substitutions
For a deeper flavor, consider caramelizing the onions for longer before adding them to the casserole. If you prefer a different cheese, Gruyère or a sharp cheddar can work well as substitutes for Swiss. To make this dish vegetarian, substitute the cream of chicken soup with a mushroom or vegetable variety. Adjust the soy sauce to taste for a touch of umami.
Serving Suggestions
This French Onion Casserole pairs beautifully with a crisp green salad or steamed vegetables for a balanced meal. Consider serving it alongside some roasted chicken or a hearty soup like German Cabbage Soup for a comforting dinner. A light red wine can complement the rich flavors of the dish, enhancing your dining experience.
Storage & Reheating
Store any leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, place the casserole in a preheated oven at 350°F (175°C) for about 20 minutes or until heated through, covering with foil if the top browns too quickly. You can also microwave individual portions for a quick meal.
Nutrition & Diet Analysis (per serving)
Each serving of French Onion Casserole contains roughly 448 calories, with 8g protein, 9g carbohydrates, and 42g fat. It is a good source of protein (16% of the Daily Value) and calcium (15% of the Daily Value). Note that it is relatively high in sodium, at 1661mg per serving (72% of the Daily Value).
Estimated from ingredients & per-serving nutrition — verify against package labels for allergies or strict diets.
* % Daily Values based on a 2,000 calorie diet (FDA 2020).
Frequently Asked Questions
Can I use other types of bread for this casserole?
Yes, you can use any type of bread you prefer, such as sourdough or whole wheat. Just ensure the bread is sturdy enough to hold up during baking. If using a softer bread, you might want to toast it lightly beforehand to prevent it from becoming too soggy in the casserole.
How can I make this recipe gluten-free?
To make this casserole gluten-free, use gluten-free bread and check that your cream of chicken soup is also gluten-free. Many brands offer gluten-free options, or you can make your own with a gluten-free flour blend. This way, you can enjoy the dish without the gluten.
Can I prepare this casserole in advance?
Absolutely! You can assemble the casserole a day ahead and refrigerate it until you're ready to bake. Just be sure to cover it well to prevent it from drying out. When you’re ready to bake, add a few extra minutes to the cooking time since it will be going into the oven cold.
Nutrition is estimated from USDA FoodData Central ingredient data and may vary with brand, portion and preparation — see our methodology. This information is for general educational purposes only and is not medical or dietary advice (disclaimer).