Absolutely! Here’s a full recipe for a Creamy, Cheesy, and Caramelized Onion Casserole — a rich and comforting dish that’s perfect for weeknights or special gatherings.
Creamy, Cheesy & Caramelized Onion Casserole
Ingredients:
For the caramelized onions:
- 2 tablespoons butter
- 2 tablespoons olive oil
- 3 large yellow onions, thinly sliced
- 1 teaspoon sugar
- ½ teaspoon salt
- 1 tablespoon balsamic vinegar (optional, for depth)
For the creamy cheese base:
- 2 tablespoons butter
- 2 tablespoons all-purpose flour
- 2 cups whole milk (warm)
- ½ cup heavy cream
- 1 teaspoon garlic powder
- ½ teaspoon black pepper
- Salt to taste
- 1 cup shredded mozzarella
- 1 cup shredded sharp cheddar
- ½ cup grated Parmesan
For assembling:
- 3 cups cooked pasta (like penne or rotini), or 3 cups sliced cooked potatoes
- Extra cheese for topping (½ cup cheddar or mozzarella)
- Optional: fresh thyme or parsley for garnish
Instructions:
1. Caramelize the Onions:
- In a large skillet over medium heat, melt the butter and olive oil.
- Add the sliced onions and stir to coat.
- Sprinkle with salt and sugar. Cook slowly for 25–30 minutes, stirring occasionally, until golden brown and soft.
- Add balsamic vinegar at the end (if using) and cook 2 more minutes. Set aside.
2. Make the Cheese Sauce:
- In a saucepan, melt the butter over medium heat.
- Add the flour and whisk constantly for 1–2 minutes to make a roux.
- Slowly pour in the warm milk and cream, whisking constantly to avoid lumps.
- Add garlic powder, salt, and pepper.
- Stir in the mozzarella, cheddar, and Parmesan until melted and smooth.
- Taste and adjust seasoning if needed.
3. Assemble the Casserole:
- Preheat your oven to 375°F (190°C).
- In a greased 9×13-inch baking dish, combine cooked pasta (or sliced potatoes), caramelized onions, and the cheese sauce. Mix well.
- Top with extra shredded cheese.
- Bake uncovered for 20–25 minutes, or until bubbly and golden on top.
4. Serve:
- Let cool for 5–10 minutes before serving.
- Garnish with fresh herbs if desired.
Tips:
- Make Ahead: Assemble and refrigerate up to 24 hours ahead. Add 10 extra minutes to baking time.
- Variations: Add cooked bacon, mushrooms, or spinach for extra flavor.
- Gluten-Free: Use cornstarch instead of flour, and gluten-free pasta or potatoes.
Would you like a printable version or an image to use on a blog or Pinterest?
