Tennessee Onion Recipe: Cheesy and Savory Oven Delight

This Tennessee Onion dish is a warm, cheesy, and savory comfort food that transforms simple onions into a mouthwatering baked delight. The combination of tender, sweet onions and melted cheeses creates an irresistible side dish that pairs perfectly with almost any meal.

Why You’ll Love This Recipe

I love how this recipe turns humble onions into a rich, flavorful dish that’s both easy and comforting. I find that the buttery layers and melted cheese create the perfect balance of creamy and savory. I like serving it alongside grilled meats, casseroles, or even as a standalone dish when I want something cheesy and satisfying.

Ingredients

(Note: All ingredient amounts are listed in the recipe card below.)

3 large onions (yellow or sweet), sliced into rings
½ cup unsalted butter, melted
1 cup shredded cheddar cheese
1 cup shredded mozzarella cheese
½ cup parmesan cheese, grated
½ teaspoon garlic powder
½ teaspoon salt
¼ teaspoon black pepper

Directions

1. I start by preheating my oven to 350°F (175°C) and greasing a 9×13-inch baking dish.
2. I slice the onions into rings and separate them, then spread them evenly across the bottom of the baking dish.
3. I drizzle the melted butter over the onions, making sure they’re well coated.
4. I sprinkle the garlic powder, salt, and black pepper evenly over the top.
5. I layer the cheddar, mozzarella, and parmesan cheeses over the seasoned onions, spreading them evenly for full coverage.
6. I bake the dish uncovered for about 30–35 minutes, or until the onions are tender and the cheese is bubbly and golden brown on top.
7. I let it cool for a few minutes before serving so the cheesy topping sets slightly.

Servings and Timing

This recipe serves about 6 people. It takes around 10 minutes to prepare and 35 minutes to bake, making it ready in about 45 minutes total.

Variations

When I want a little spice, I sprinkle some crushed red pepper flakes or add a few slices of jalapeño. For a creamier version, I mix a few tablespoons of sour cream into the melted butter before drizzling it over the onions.

Storage/Reheating

I store leftovers in an airtight container in the refrigerator for up to 4 days. To reheat, I place them in the oven at 350°F for about 10–12 minutes or until hot and bubbly again. The microwave also works for a quicker option, though the oven keeps the cheese crispier.

FAQs

Can I use red onions instead of yellow?

Yes, but I prefer yellow or sweet onions for their milder flavor when baked.

Can I make this dish ahead of time?

Yes, I assemble it a few hours in advance, refrigerate it, and then bake it just before serving.

What can I serve this with?

I love serving it with steak, grilled chicken, or burgers. It’s also delicious alongside casseroles or roasted vegetables.

Can I use pre-shredded cheese?

I can, but I prefer shredding my own cheese because it melts more smoothly without the anti-caking agents.

How do I make it less rich?

I reduce the butter slightly or use part-skim mozzarella to lighten it up.

Can I add breadcrumbs on top?

Absolutely. A sprinkle of breadcrumbs before baking adds a nice crunchy texture.

Can I use a different cheese blend?

Yes, I sometimes use Monterey Jack or Gruyère for a more unique flavor.

How do I prevent the onions from becoming soggy?

I make sure not to cover the dish while baking so the steam can escape and the cheese can brown nicely.

Can I make it in a smaller pan?

Yes, I halve the ingredients and bake it in an 8×8-inch dish if I want fewer servings.

Does this freeze well?

I prefer to enjoy it fresh, but I can freeze it tightly wrapped for up to a month. I reheat it in the oven until warmed through.

Conclusion

I love making this Tennessee Onion Recipe because it’s simple, cheesy, and full of flavor. The layers of tender onions and gooey melted cheese make it a standout side dish for any meal. Whether I’m serving it for a family dinner or a special gathering, it always brings comfort and plenty of compliments to the table.

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