If you love sweet onions, melted cheese, and rich buttery flavors, these Tennessee Onions are a must-try! This simple Southern-inspired side dish transforms ordinary sweet onions into a delicious, cheesy creation with tender layers, golden edges, and plenty of savory flavor.
Made with sweet Vidalia onions, butter, garlic, and melted cheese, this recipe is incredibly easy to prepare and pairs beautifully with grilled meats, roasted chicken, burgers, or barbecue. If you’re looking for a comforting side dish that will impress your family without requiring hours in the kitchen, these baked Tennessee Onions are the perfect choice.
Ingredients
- 3–4 large Vidalia sweet onions
- 4 tablespoons unsalted butter
- 1 teaspoon salt, or to taste
- 1 teaspoon garlic powder
- ½ teaspoon dried oregano
- ½ teaspoon dried thyme
- ½ teaspoon black pepper
- 1 cup shredded mozzarella cheese
- 1 cup shredded cheddar cheese
- ½ cup grated Parmesan cheese
- 1 tablespoon chopped fresh parsley (optional)
Instructions
Step 1: Prepare the Onions
Preheat your oven to 375°F (190°C). Lightly grease a baking dish with butter or cooking spray.
Peel the Vidalia onions and cut them into thick slices, approximately ½ inch thick. Separate the slices into rings or leave them in stacked rounds, depending on your preferred presentation.
Arrange the onions in the prepared baking dish.
Step 2: Season the Onions
Sprinkle the onions evenly with salt, garlic powder, black pepper, oregano, and thyme.
Cut the butter into small pieces and distribute them over the onions so that the butter melts evenly during baking.
Step 3: Add the Cheese
Sprinkle the mozzarella, cheddar, and Parmesan cheeses generously over the onions.
The mozzarella creates a wonderfully stretchy texture, the cheddar adds a rich flavor, and the Parmesan helps develop a delicious golden topping.
Step 4: Bake Until Tender
Place the baking dish in the preheated oven and bake for approximately 30–40 minutes, or until the onions are tender and the cheese is melted and golden brown.
Cooking time may vary depending on the thickness of the onion slices. Check the onions with a fork to make sure they have softened.
For a deeper golden crust, broil for another 1–2 minutes, watching carefully to prevent burning.
Step 5: Garnish and Serve
Remove the dish from the oven and let it rest for about 5 minutes.
Sprinkle with freshly chopped parsley if desired, then serve warm while the cheese is still deliciously melted.
Tips for the Best Tennessee Onions
- Choose sweet onions: Vidalia onions are ideal because their natural sweetness balances the savory cheese.
- Cut evenly: Uniform slices help the onions cook at the same rate.
- Use freshly shredded cheese: It generally melts more smoothly than many pre-shredded varieties.
- Adjust the seasoning: Add a pinch of paprika or red pepper flakes if you enjoy a little extra flavor.
- Watch the cheese carefully: Broiling creates a golden top quickly, so keep an eye on the dish.
What to Serve With Tennessee Onions
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