Sweet Onion Casserole
A Rich, Comforting Dish Full of Flavor
If you’re looking for a versatile and comforting side dish that’s guaranteed to impress, Sweet Onion Casserole is the perfect choice. This creamy, cheesy casserole beautifully highlights the natural sweetness of onions, balanced with aromatic herbs and a golden, crunchy topping. Whether you’re hosting a dinner party or preparing a weeknight meal, this dish adds a touch of gourmet to any table.
Ingredients
| Ingredient | Quantity |
|---|---|
| Sweet onions | 4 large |
| Butter | 1/4 cup |
| Garlic cloves | 3, minced |
| Thyme leaves | 1 teaspoon |
| Heavy cream | 1 cup |
| Gruyère cheese | 1 cup, grated |
| Parmesan cheese | 1/2 cup, grated |
| Breadcrumbs | 1/2 cup |
| Salt | To taste |
| Black pepper | To taste |
Instructions
- Prepare the Onions: Peel and thinly slice the sweet onions. Set aside.
- Sauté the Onions: In a large skillet, melt the butter over medium heat. Add minced garlic and cook until fragrant. Add onions and sauté for 15–20 minutes until soft and golden.
- Add Herbs: Sprinkle in thyme leaves and stir well.
- Create the Creamy Base: Pour in the heavy cream and simmer for a few minutes until slightly thickened.
- Add the Cheeses: Stir in grated Gruyère and Parmesan until melted and creamy.
- Season: Season with salt and black pepper to taste.
- Assemble the Casserole: Transfer the mixture to a greased baking dish. Sprinkle breadcrumbs evenly on top.
- Bake: Bake at 375°F (190°C) for 20–25 minutes, or until golden brown and bubbly.
- Serve: Let it cool slightly before serving. Enjoy!
Tips for the Perfect Casserole
- Use sweet onion varieties like Vidalia or Walla Walla for the best flavor.
- Fresh thyme leaves add a more vibrant, aromatic note.
- Add a touch of sharp cheddar for extra depth and richness.
Frequently Asked Questions
Can I make this ahead of time?
Yes! Assemble the casserole, cover, and refrigerate for up to 24 hours before baking.
Can I freeze Sweet Onion Casserole?
Absolutely. Let it cool completely, then wrap tightly and freeze for up to 2 months. Reheat in the oven until hot.
What can I serve with this dish?
It pairs beautifully with roasted meats, grilled chicken, or a fresh green salad.
