I really enjoy this dish because it transforms a few basic ingredients into something warm, rich, and comforting. The sweet onions soften and caramelize beautifully in the oven, and the melted cheese on top brings everything together into a cozy, savory side that I love serving with almost anything.
Why You’ll Love This Recipe
I like this recipe because it is simple, affordable, and incredibly satisfying. I do not need complicated steps or special tools, and the flavors feel indulgent despite the short ingredient list. I also appreciate how well it works as both a side dish and a light main when I want something easy.
Ingredients
(Tip: You’ll find the full list of Ingredients and measurements in the recipe card below.)
3 large sweet onions
2 tablespoons unsalted butter, melted
1/2 teaspoon salt
1/4 teaspoon black pepper
1/2 teaspoon garlic powder
1 cup shredded mozzarella cheese
1/2 cup shredded cheddar cheese
Directions
I begin by preheating the oven to 375°F (190°C). I lightly grease a baking dish to prevent sticking.
I peel the onions and slice them into thick rounds, about 1/2 inch thick. I arrange the onion slices in a single layer in the baking dish.
I drizzle the melted butter evenly over the onions. I then sprinkle the salt, black pepper, and garlic powder over the top, making sure everything is evenly seasoned.
I cover the baking dish with foil and bake for 25 minutes, until the onions are very tender and lightly caramelized.
I remove the foil, sprinkle the mozzarella and cheddar evenly over the onions, and return the dish to the oven uncovered. I bake for another 10 minutes, until the cheese is fully melted and lightly golden.
I let the dish cool for a few minutes before serving.
I sometimes add 1/4 teaspoon dried thyme or oregano for extra flavor. When I want a sharper taste, I increase the cheddar and reduce the mozzarella slightly. I also enjoy adding a light sprinkle of grated Parmesan on top for a deeper, savory finish.
Storage/Reheating
I store leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, I prefer using the oven at 350°F (175°C) for about 10 minutes so the cheese melts smoothly. If I am short on time, I reheat individual portions in the microwave.
FAQs
Can I Use A Different Type Of Onion?
I can use yellow onions, but the flavor will be stronger and less sweet. Sweet onions give the best result for this recipe.
Can I Use Only One Type Of Cheese?
Yes, I can use just mozzarella or just cheddar. I find that using both gives the best balance of melt and flavor.
Can I Make This Recipe Ahead Of Time?
I can bake the onions without the cheese, store them in the refrigerator, and add the cheese right before reheating and serving.
Does This Dish Freeze Well?
I do not recommend freezing it, as the texture of the onions and cheese changes once thawed.
What Can I Serve This With?
I like serving this with roasted meats, grilled vegetables, or alongside a simple salad for a lighter meal.
Conclusion
I love how baked sweet onions with cheese delivers so much flavor with so little effort. It is a comforting, reliable recipe that I enjoy making again and again, especially when I want something warm and satisfying without spending much time in the kitchen.
