Cheesy Onion Casserole is a comforting and flavorful dish that’s perfect for any family gathering or weeknight dinner. This dish combines tender onions with a creamy, cheesy sauce and a crunchy, golden topping that bakes to perfection. The onions are slowly sautéed to bring out their natural sweetness, then mixed with cheese and a savory binder to create a rich, indulgent casserole. Topped with a layer of crispy breadcrumbs, it’s a crowd-pleasing side dish that will quickly become a favorite at your table. Whether you serve it with roasted meats or enjoy it on its own, Cheesy Onion Casserole is sure to satisfy.
Ingredients:
- 4 large onions, thinly sliced
- 2 tbsp unsalted butter
- 1 can (10.5 oz) cream of mushroom soup
- 1/2 cup sour cream
- 1 1/2 cups shredded cheddar cheese
- 1/2 cup grated Parmesan cheese
- 1 tsp garlic powder
- 1/2 tsp salt
- 1/4 tsp freshly ground black pepper
- 1 cup breadcrumbs (preferably panko)
- 2 tbsp melted butter (for topping)
Instructions:
- Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a 9×13-inch casserole dish with cooking spray or butter.
- Sauté the Onions: In a large skillet, melt 2 tablespoons of butter over medium heat. Add the sliced onions and sauté, stirring occasionally, for about 10-12 minutes until they are soft and golden brown. Set aside to cool slightly.
- Make the Sauce: In a large mixing bowl, combine the cream of mushroom soup, sour cream, cheddar cheese, Parmesan cheese, garlic powder, salt, and pepper. Stir in the sautéed onions and mix well to coat the onions with the creamy sauce.
- Assemble the Casserole: Pour the onion mixture into the prepared casserole dish, spreading it out evenly.
- Prepare the Topping: In a small bowl, combine the breadcrumbs with the melted butter. Stir until the breadcrumbs are coated with butter, then sprinkle them evenly over the casserole.
- Bake: Bake the casserole in the preheated oven for 25-30 minutes, or until the top is golden brown and the casserole is bubbling around the edges.
- Serve: Let the casserole rest for a few minutes before serving. Enjoy this cheesy, savory side dish with your favorite main course!
This Cheesy Onion Casserole is rich and creamy with just the right amount of crunch from the breadcrumb topping. It’s the ultimate comfort food!
