Introduction to Tennessee Onions
Tennessee onions are a delightful dish that truly embodies the essence of Southern comfort food. These baked onion casseroles, featuring sweet Vidalia or other sweet onions, bring warmth and heartiness to any meal. The combination of flavors—from the tangy cheeses to the subtle spices—creates a symphony of taste that's hard to resist. If you’re someone who enjoys homemade cooking or simply looking to spice up your weeknight dinners, you’re in for a treat!
Why Tennessee Onions Are a Must-Try Dish for Homemade Food Lovers
What sets Tennessee onions apart is their unique ability to transform ordinary ingredients into something extraordinary. Picture this: layers of tender onions combined with a rich mixture of mild cheddar, smoked Gouda, and Parmesan cheese, all baked to golden perfection. It’s the kind of dish that makes your house smell inviting and your guests nod in approval.
Moreover, sweet onions offer a level of sweetness and depth that raw onions simply can’t match. With every bite, you’ll taste the carefully balanced flavors, making it an ideal accompaniment to chicken, turkey bacon, or even served as a stand-alone dish.
For those looking to put their culinary skills to the test, making Tennessee onions is easy and incredibly satisfying. Dive into this recipe and discover how simple it is to create something that feels special. Ready to cook? Check out the full recipe here and transform your next meal!

Ingredients for Tennessee Onions
When it comes to whipping up a comforting Tennessee onion casserole, the right ingredients make all the difference. Here’s what you’ll need to create this incredibly flavorful dish:
Essential ingredients for a delicious casserole
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Cooking spray: For greasing your baking dish and ensuring easy cleanup.
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3 pounds Vidalia or sweet onions: You’ll need about four large onions, sliced crosswise into ¼-inch-thick pieces. These sweet onions are key to the dish’s flavor.
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Spices: A combination of 1 ½ teaspoons kosher salt, 1 teaspoon dry mustard powder, 1 teaspoon garlic powder, 1 teaspoon smoked paprika, and an optional ¼ teaspoon cayenne pepper for a gentle kick.
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Cheeses: Incorporate 4 ounces of shredded mild cheddar, 4 ounces of smoked Gouda, and 1 ¼ ounces of grated Parmesan cheese for that cheesy goodness.
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Unsalted butter: Four tablespoons, diced for a rich finish.
Optional garnishes and substitutes
Feel free to add a sprinkle of finely chopped fresh parsley leaves to brighten up the dish. Additionally, if you're low on a particular cheese, you can substitute with your favorite melty variety. Try experimenting with other tasty cheeses like Monterey Jack or even a sharp aged cheddar to switch things up!
For even more variety, consider mixing in some cooked turkey bacon or chicken ham in the layers for added depth.
Whether you keep it traditional or customize it to your taste, these ingredients will help you create a fantastic batch of Tennessee onions that everyone will love!
Preparing Tennessee Onions
Tennessee onions are a delightful dish that bring out the natural sweetness of Vidalia onions, making for a comforting and flavorful casserole. Whether you're serving them as a side dish for a family dinner or a potluck, the preparation is a breeze! Let’s take a closer look at how to prepare this scrumptious dish.
Preheat the oven and prepare the baking dish
Begin by preheating your oven to 350ºF. This step is crucial for ensuring that your Tennessee onions bake evenly. While the oven heats up, lightly coat a 9x13-inch baking dish with cooking spray. This will make cleanup a lot easier later, since melted cheese has a tendency to stick! Setting the stage in this way prepares your dish for all those delicious layers to come.
Slice and season the Vidalia onions
Next, it's time to slice your Vidalia onions. You’ll want to cut them crosswise into ¼-inch-thick slices. Once sliced, place the onion rings into a large bowl. To season them to perfection, add 1 ½ teaspoons of kosher salt, 1 teaspoon each of dry mustard powder, garlic powder, and smoked paprika, and if you’re feeling adventurous, ¼ teaspoon of cayenne pepper. Toss everything well to ensure each ring is evenly coated. Not only does this seasoning bring out the onion’s natural sweetness, but it also adds delightful layers of flavor!
Layering the onion rings and cheeses
Start building your casserole by arranging half of the seasoned onion rings in an even layer at the bottom of your prepared baking dish. Follow this by sprinkling 2 ounces each of shredded mild cheddar cheese and smoked Gouda cheese, giving it that extra melty goodness. Layer the remaining onion rings on top and sprinkle with the remaining cheeses. Then, finish with 1 ¼ ounces of grated Parmesan cheese. The combination of these cheeses creates a beautiful, gooey topping that’s hard to resist!
Baking the casserole to perfection
Once your casserole is layered, cover the baking dish with aluminum foil and bake it in your preheated oven for about 45 minutes. This will soften the onions and allow all those flavors to meld together. After that, remove the foil and let it bake for an additional 30 minutes, or until the cheese is melted and has developed a lovely golden brown hue.
Adding finishing touches after baking
Once the casserole is done and you’ve savored the aroma filling your kitchen, take it out of the oven. If you're up for a little garnishing, sprinkle 2 tablespoons of finely chopped fresh parsley over the top. Not only does this add a pop of color, but it also enhances the flavor profile. Serve your delicious Tennessee onions warm and watch your friends and family rave about this delightful dish!
For an excellent guide on how to work with onions, check out this resource from Culinary Institute of America. Happy cooking!

Variations on Tennessee Onions
Spicy Tennessee Onions with Added Heat
If you're a fan of spice, consider elevating your Tennessee onions by adding some extra heat! A sprinkle of red pepper flakes or a dash of hot sauce can rev up the flavor profile, making these cheesy delights even more exciting. Try swapping in pepper jack cheese for added zing. This fiery twist is perfect for those who love a bit of sass in their savory dishes.
Vegetarian Twists Using Different Cheese Blends
For a more plant-friendly version, experiment with assorted cheese blends. Use creamy mozzarella or tangy goat cheese to create a delightful fusion. You could even venture into the world of non-dairy cheeses without sacrificing texture or flavor. These variations not only cater to vegetarian guests but also keep things fresh and fun. Curious about more vegetarian options? Check out these cheese alternatives for inspiration!
Cooking Tips for Tennessee Onions
How to Properly Store Leftovers
If you find yourself with delicious leftovers of Tennessee onions, you can enjoy them for a few days more! Simply transfer any leftovers into an airtight container and refrigerate. They should stay fresh for about 4 days. To reheat, pop them in the oven or microwave until warmed through. Just ensure they’re heated evenly for the best taste!
Suggestions for Modifying the Recipe
Want to get a little creative? You can easily modify this Tennessee onions recipe to suit your tastes. Consider adding cooked turkey bacon or chicken ham for a savory twist. You might also experiment with different cheese blends—goat cheese or pepper jack could add a lovely hint of flavor. For a touch of sweetness, try incorporating some caramelized onions or sautéed bell peppers. The options are endless, so feel free to make this dish your own!

Serving Suggestions for Tennessee Onions
Pairing with Main Dishes
Tennessee onions make an excellent side dish for a variety of main courses. Try them with grilled chicken, juicy beef steaks, or flavorful turkey burgers to balance the richness of the meat. You can also serve them alongside roasted vegetables for a satisfying vegetarian meal. The savory, creamy texture of the onions complements barbecue favorites like pulled chicken or beef brisket beautifully. For a more decadent experience, spoon them over baked potatoes or as a topping for homemade flatbreads.
Creative Ways to Enjoy Tennessee Onions as Appetizers
Transform Tennessee onions into delightful appetizers with simple creativity. Serve them in small ramekins with crusty bread for dipping, or use them as a filling for savory pastries. They also shine when paired with a light dip, such as creamy ranch or tangy hummus. For an impressive starter, layer them with smoked salmon and cream cheese on crispy crackers. Need some inspiration? Check out Delish's ideas for more appetizer variations that can elevate your next gathering!
Time Breakdown for Tennessee Onions
Preparation Time
Getting started on your Tennessee onions is a breeze! You’ll need about 15 minutes to gather your ingredients and slice those sweet Vidalia onions perfectly.
Cooking Time
Once you’re all set, the cooking process takes approximately 1 hour and 15 minutes—with 45 minutes covered by foil and an additional 30 minutes unfurled to achieve cheesy perfection.
Total Time
In total, you'll spend around 1 hour and 30 minutes from start to finish. This delightful casserole is well worth the wait and a fantastic addition to any meal!
For tips on how to select the best onions, check out this guide on onion varieties that can help enhance your dishes. Happy cooking!
Nutritional Facts for Tennessee Onions
When it comes to delicious side dishes, Tennessee onions pack a flavorful punch while still being mindful of nutrition. Here’s a quick look at their key nutritional components:
Calories
A serving of Tennessee onions delivers approximately 150 calories, making them a satisfying yet guilt-free addition to any meal.
Protein
You’ll find that each serving offers around 5 grams of protein, thanks in part to the cheesy goodness. This can help keep you feeling full longer!
Sodium
With about 300 milligrams of sodium per serving, Tennessee onions can be enjoyed as a part of a balanced diet without going overboard on salt.
This dish is all about flavor, so don’t hesitate to explore more about onion nutrition on Healthline and get cooking!
FAQs about Tennessee Onions
Can I use other types of onions besides Vidalia?
Absolutely! While Vidalia onions bring that sweet, mild flavor that makes Tennessee onions a standout dish, you can certainly use other sweet onion varieties like Walla Walla or Maui if they're available. Just keep in mind that the taste may vary slightly, so adjust your seasonings if needed.
How do I store and reheat leftovers?
To store your leftover Tennessee onions, place them in an airtight container and refrigerate for up to four days. When you’re ready to enjoy them again, simply reheat in the oven at 350ºF for about 15-20 minutes, or until warmed through. You can also microwave them for a quick option, but the oven helps preserve that delicious cheesy crust.
What are some creative uses for leftover Tennessee onions?
Leftover Tennessee onions aren’t just for reheating! Use them as a flavorful topping for burgers, sandwiches, or even tacos. You can mix them into an omelet for a hearty breakfast or toss them into pasta dishes for an extra layer of flavor. The possibilities are endless! For more ideas, check out this cooking blog for inspiration.
Conclusion on Tennessee Onions
Tennessee onions offer a delightful combination of sweet, savory flavors, making them a perfect side dish for gatherings or cozy dinners. With their cheesy, buttery goodness, these onions are sure to impress. Don’t forget to savor every bite and share your thoughts; we’d love to hear how they turn out!
For further reading on the versatility of onions, check out The Onion’s Health Benefits.

Tennessee Onions
Equipment
- 9x13 inch baking dish
Ingredients
- 3 pounds Vidalia or sweet onions cut crosswise into ¼-inch-thick slices
- 1.5 teaspoons kosher salt
- 1 teaspoon dry mustard powder
- 1 teaspoon garlic powder
- 1 teaspoon smoked paprika
- 0.25 teaspoon cayenne pepper optional
- 4 ounces mild cheddar cheese shredded (about 1 cup), divided
- 4 ounces smoked Gouda or cheddar cheese shredded (about 1 cup), divided
- 1.25 ounces grated Parmesan cheese about ⅓ cup store-bought grated
- 4 tablespoons unsalted butter diced (½ stick)
- 2 tablespoons finely chopped fresh parsley leaves for garnish (optional)
- Cooking spray
Instructions
- Heat the oven to 350ºF. Lightly coat a 9x13-inch baking dish with cooking spray. Separate 3 pounds sliced Vidalia onions into rings and place in a large bowl. Add 1 ½ teaspoons kosher salt, 1 teaspoon dry mustard powder, 1 teaspoon garlic powder, 1 teaspoon smoked paprika, and ¼ teaspoon cayenne pepper, and toss to coat.
- Arrange half of the onion rings in an even layer in the baking dish. Sprinkle evenly with 2 ounces shredded mild cheddar cheese and 2 ounces shredded smoked Gouda cheese (about ½ cup each).
- Arrange the remaining onions on top and sprinkle with the remaining 2 ounces each shredded mild cheddar and smoked Gouda. Sprinkle evenly with 1 ¼ ounces grated Parmesan cheese. Scatter 4 tablespoons diced unsalted butter on top.
- Cover the baking dish with aluminum foil. Bake until the onions are softened and the casserole is bubbling, about 45 minutes. Uncover and bake until the cheese on top is melted and browned in spots, about 30 minutes more. Sprinkle with 2 tablespoons finely chopped fresh parsley leaves if desired.





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