Swiss Cheese Onion Casserole
A comforting casserole combining caramelized onions, Swiss cheese, and creamy mushroom soup, topped with crunchy bread crumbs—perfect for family dinners or potlucks.
Ingredients
Instructions
- Saute sliced onions in margarine until golden and tender.
- Mix the mushroom soup, sautéed onions, and shredded Swiss cheese together.
- Transfer the mixture to a baking dish.
- Top with chunky hard bread crumbs.
- Bake at 350°F (175°C) for 35 to 45 minutes until bubbly and golden.
Tips & Substitutions
For a richer flavor, consider adding garlic or a splash of white wine while sautéing the onions. If you don't have Swiss cheese, Gruyère or mozzarella can be used as substitutes. For a gluten-free option, replace the chunky hard bread crumbs with crushed gluten-free crackers or breadcrumbs. Experiment with adding herbs like thyme or parsley for extra depth.
Serving Suggestions
This casserole is a hearty dish that pairs well with a simple green salad or roasted vegetables for a balanced meal. It also complements grilled meats or fish nicely. Serve it alongside dishes like Hush Puppies With Frankfurters for a delightful mix of flavors. For a vegetarian option, enjoy it with a side of seasoned quinoa or brown rice.
Storage & Reheating
Allow the Swiss Cheese Onion Casserole to cool completely before storing it in an airtight container in the refrigerator. It can be kept for up to three days. To reheat, place it in the oven at 350°F (175°C) for about 20 minutes, or until heated through. You can also microwave individual portions, but the oven will keep the topping crisp.
Nutrition & Diet Analysis (per serving)
Each serving of Swiss Cheese Onion Casserole contains roughly 955 calories, with 7g protein, 22g carbohydrates, and 95g fat. It is a good source of protein (14% of the Daily Value) and calcium (12% of the Daily Value). Note that it is relatively high in sodium, at 890mg per serving (39% 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 prepare the casserole in advance?
Yes, you can prepare the casserole ahead of time. Assemble it, cover it with foil, and refrigerate for up to 24 hours before baking. When ready to bake, allow it to sit at room temperature for about 30 minutes before placing it in the oven to ensure even cooking.
What can I use instead of margarine?
If you prefer not to use margarine, you can substitute it with unsalted butter or olive oil. Both options will provide great flavor and richness to the sautéed onions, enhancing the overall taste of the casserole.
Can I add other vegetables to the casserole?
Absolutely! Feel free to add vegetables like bell peppers, spinach, or mushrooms to the mixture for added nutrition and flavor. Just sauté them alongside the onions until tender before mixing in the other ingredients.
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).