This cheesy onion casserole is a comforting and flavorful dish that is perfect for family gatherings or weeknight dinners. With layers of caramelized onions, creamy cheese sauce, and crunchy breadcrumbs, this casserole is sure to be a hit.
Ingredients
- 6 large onions, thinly sliced
- 1/4 cup butter
- 2 tablespoons all-purpose flour
- 1 cup milk
- 1 cup shredded cheddar cheese
- 1/2 cup grated Parmesan cheese
- 1 cup breadcrumbs
- Salt and pepper to taste
Directions
- Preheat the oven to 350°F and grease a 9x13 inch baking dish.
- In a large skillet, melt the butter over medium heat. Add the sliced onions and cook until caramelized, about 20 minutes.
- Stir in the flour and cook for 2 minutes. Gradually whisk in the milk, stirring constantly until the sauce thickens.
- Remove from heat and stir in the cheddar cheese until melted. Season with salt and pepper.
- Pour the cheese sauce over the caramelized onions in the baking dish.
- In a small bowl, combine the Parmesan cheese and breadcrumbs. Sprinkle over the top of the casserole.
- Bake for 20-25 minutes, or until the top is golden brown and bubbly.
- Serve hot and enjoy!
Interesting Facts
Onions are a great source of antioxidants and can help boost immunity.
Cheese is high in calcium and protein, making this casserole a nutritious dish.
This casserole can be easily customized with added herbs or spices for extra flavor.