Caramelized Onion Casserole

If you’re searching for a dish that’s both comforting and full of flavor, this Sweet Onion Casserole is a fantastic choice. The natural sweetness of the onions pairs beautifully with a rich, creamy cheese mixture, making it perfect for family meals, potlucks, or special gatherings. Below you’ll find everything you need—an ingredient table, detailed instructions, and helpful tips to ensure your casserole turns out perfectly.

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📝 Sweet Onion Casserole Recipe

Ingredients

Ingredient	Quantity
Sweet onions	4 large
Butter	1/4 cup
Garlic cloves	3, minced
Thyme leaves	1 tsp
Heavy cream	1 cup
Gruyere cheese	1 cup, grated
Parmesan cheese	1/2 cup, grated
Breadcrumbs	1/2 cup
Salt	To taste
Black pepper	To taste

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👩‍🍳 Instructions

1. Prep the Onions: Peel the onions and slice them thinly. Set aside until ready to use.
2. Sauté: Melt the butter in a large skillet over medium heat. Add the minced garlic and cook briefly until fragrant. Add the onions and cook for 15–20 minutes, stirring occasionally, until they become soft and golden.
3. Add Herbs: Sprinkle the thyme over the onions and stir to combine, allowing the flavors to blend.
4. Add the Cream: Pour in the heavy cream and let the mixture simmer until slightly thickened.
5. Incorporate Cheeses: Add the Gruyere and Parmesan, stirring until the cheeses melt into a smooth, creamy sauce.
6. Season: Taste and adjust with salt and black pepper, remembering that the cheeses contribute their own saltiness.
7. Assemble: Transfer the onion mixture into a greased baking dish. Top evenly with the breadcrumbs for a crunchy topping.
8. Bake: Preheat your oven to 375°F (190°C). Bake the casserole for 20–25 minutes or until the top is golden and bubbling.
9. Serve: Allow it to cool for a few minutes before serving generous portions of this cozy, savory dish.

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⭐ Tips for Success

• Choose naturally sweet varieties like Vidalia or Walla Walla for the best flavor.
• Fresh thyme adds a bright, aromatic touch.
• Experiment with additional cheeses—cheddar is a great pick if you want an even richer taste.