Cheesy Tennessee Onions are the perfect side dish to elevate any meal. Think warm, gooey cheese, tender onions, and a crispy, golden topping that makes your taste buds do a happy dance. Whether you’re serving them at a cozy family dinner or a festive holiday gathering, these onions bring that comforting southern charm to your plate. And guess what? They’re super easy to make, using ingredients you likely already have in your pantry. No complicated steps, just mouthwatering flavor that will have everyone asking for seconds. Let’s dive into this cheesy goodness.

Why You’ll Love These Cheesy Tennessee Onions
A Flavor-Packed Side Dish
Cheesy Tennessee Onions are not just any side dish. They’re a savory, cheesy, and slightly sweet treat that pairs wonderfully with a variety of meals. The richness of the cheese blends perfectly with the natural sweetness of the onions, creating an irresistible combination.
Perfect for Any Occasion
Whether it’s a weeknight dinner or a holiday celebration, these cheesy onions are an excellent choice. They’re simple to make, and their deliciously indulgent nature makes them a crowd-pleaser. You’ll be the hero of any meal when you bring these to the table!
Ingredients You Need for Cheesy Tennessee Onions
Main Ingredients for the Onion Base
For this recipe, you’ll need:
- Yellow Onions – 3 large onions, thinly sliced. Yellow onions are the go-to choice for their perfect balance of sweetness and flavor.
- Olive Oil – 2 tablespoons for sautéing the onions.
- Butter – 1 tablespoon for richness in flavor.
- Garlic – 2 cloves, minced, to give the onions a savory punch.
Cheese and Seasoning: The Magic Touch
- Cheddar Cheese – 2 cups of shredded sharp cheddar for that melt-in-your-mouth cheesiness.
- Parmesan Cheese – 1/2 cup grated parmesan for a salty, umami flavor boost.
- Seasonings – Salt, pepper, and a pinch of thyme to enhance the onion’s natural flavors.
How to Make Cheesy Tennessee Onions
Step 1: Prep the Onions
Start by slicing your onions thinly. This will help them cook evenly and soak up all the cheesy goodness. Sauté them in olive oil and butter over medium heat until they’re soft and golden brown, which takes about 8-10 minutes. Add the minced garlic toward the end and sauté for another minute until fragrant.
Step 2: Mix the Cheese and Seasoning
In a separate bowl, combine the shredded cheddar cheese, parmesan cheese, salt, pepper, and thyme. Stir well to evenly distribute the seasonings. You can even add a little extra cheese if you’re a big fan of cheesy dishes!
Step 3: Bake to Perfection
Preheat your oven to 350°F (175°C). Transfer the sautéed onions into a baking dish and spread them out evenly. Sprinkle the cheese mixture on top, making sure it covers the onions completely. Bake for 20-25 minutes until the cheese is melted and bubbly, and the top is golden and crispy.
Tips and Tricks for the Best Cheesy Tennessee Onions
Choosing the Right Onions
While yellow onions are the go-to choice for their perfect balance of sweetness and mild sharpness, you can experiment with different varieties depending on your flavor preference. If you prefer a sweeter taste, you can swap yellow onions for sweet onions like Vidalia. These will bring a more mellow, naturally sweet flavor to the dish. On the other hand, red onions can be used for a slightly more pungent and vibrant taste. Just be sure to slice them thinly to ensure even cooking and a soft texture.
How to Get the Perfect Crunchy Topping
For the ultimate crispy, golden topping, adding breadcrumbs is a game changer. Simply sprinkle about 1/4 cup of plain breadcrumbs or panko breadcrumbs (for extra crunch) over the cheese mixture before baking. If you want to take it up a notch, you can toss the breadcrumbs with a tablespoon of melted butter or a little bit of grated parmesan for an even richer, golden finish. For a gluten-free version, you can use gluten-free breadcrumbs or crushed rice crackers as a substitution.
Get Even Onion Flavor with Layering
When assembling the dish, consider layering the onions in the baking dish. Spread a layer of sautéed onions at the bottom, then sprinkle a generous amount of cheese over it, followed by more onions and cheese. This ensures that every bite is perfectly cheesy and onion-y. The cheese will melt into the onions, creating that irresistible gooey texture.
Watch the Baking Time
Ovens vary, so keep an eye on your cheesy onions as they bake. If you find that the cheese is bubbling but the top isn’t quite golden enough, turn on the broiler for the last 1-2 minutes. Just make sure to watch it carefully to avoid burning! This quick step will give the dish a beautifully crisp and browned top.
Make Ahead Tip
If you’re preparing this dish ahead of time, you can do most of the work the day before. Sauté the onions, mix the cheeses, and assemble the dish. Cover it tightly with plastic wrap or aluminum foil and refrigerate. When you’re ready to bake, remove it from the fridge and let it sit for about 15 minutes to come to room temperature before popping it in the oven. This way, you’ll have a stress-free, delicious side dish ready to go when you need it.
Add a Flavor Twist
Feel free to get creative with the seasonings. For an extra layer of flavor, you can stir in a pinch of paprika or a bit of garlic powder along with the thyme. A touch of crushed red pepper flakes will bring some heat if you like a little spice. Don’t be afraid to experiment with your favorite spices to make the dish your own.
Variations and Substitutions
Make It Spicy with Jalapeños
If you love a little heat, adding jalapeños is an easy way to spice up your Cheesy Tennessee Onions. Simply chop 1-2 fresh jalapeños (remove the seeds if you prefer a milder heat) and sauté them with the onions. The slight heat from the jalapeños pairs wonderfully with the creamy, cheesy base, giving the dish an extra kick without overpowering the flavors. You can also add a sprinkle of cayenne pepper or crushed red pepper flakes if you want to turn up the spice even more!
Substitute Cheese Options
While the classic combination of cheddar and parmesan cheese is a winner, don’t hesitate to get creative with your cheese choices! Here are some great substitutions:
- Gouda: If you want a smoky flavor to complement the richness of the dish, try substituting half of the cheddar with smoked gouda.
- Monterey Jack: For a creamier texture, Monterey Jack cheese melts beautifully and gives a mild, buttery taste.
- Cream Cheese: For a creamier, slightly tangy twist, you can mix in a few ounces of softened cream cheese with the shredded cheese. It’ll add a rich, velvety texture to the dish.
- Vegan Cheese: If you’re looking for a dairy-free option, use a plant-based cheese that melts well, such as vegan cheddar or cashew cheese.
Add Protein for a Heartier Dish
If you want to turn this side dish into a more substantial main, consider adding some protein to the mix. Shredded rotisserie chicken or diced turkey would pair wonderfully with the onions and cheese. For a more Southern twist, you could even add chopped beef bacon or turkey bacon for that smoky, savory flavor. Simply layer the protein into the dish when you assemble it, and bake as usual. This turns it into a comforting, one-pan meal that’s both hearty and flavorful.
Switch Up the Onions
While yellow onions are the traditional choice, feel free to try different types of onions for unique flavors:
- Sweet Onions (like Vidalia): These will give the dish a softer, more mellow sweetness that balances well with the cheese.
- Red Onions: These onions bring a slightly sharper, more pungent flavor. If you like a bit of bite, red onions are a great option. Just be aware that they can color the dish with a bit of purple, which doesn’t affect the taste but may change the presentation slightly.
- Shallots: For a more delicate, mild onion flavor, use shallots. They’ll provide a subtle sweetness that blends beautifully with the cheese.
Make It Gluten-Free
If you’re following a gluten-free diet, simply swap out the breadcrumbs for gluten-free breadcrumbs or crushed rice crackers. These will still give you that satisfying crunch without compromising the flavor. You can also omit the breadcrumbs entirely for a slightly less crunchy but equally delicious result.
Add Fresh Herbs or Greens
For an added layer of freshness, consider mixing in some fresh herbs or greens into the onions before baking. A handful of chopped spinach, kale, or parsley can be sautéed along with the onions to add a pop of color and nutrition. Fresh herbs like basil, oregano, or rosemary can also complement the dish with additional aromatic notes.
Try a Dairy-Free Version
For a dairy-free version, you can substitute the cheese with a combination of nutritional yeast (for a cheesy flavor) and vegan cheese. Additionally, swap the butter with olive oil or vegan butter and use coconut milk or almond milk in place of any cream or milk. This way, you can still enjoy the rich, cheesy flavors without any dairy.
How to Serve and Store Your Cheesy Tennessee Onions
Serving Suggestions
Cheesy Tennessee Onions are versatile and can be served as a side dish to almost anything. Pair them with roasted chicken, grilled steak, or even a comforting bowl of soup. They’re the perfect addition to your next family meal or holiday spread!
Storage Tips
If you have leftovers, store them in an airtight container in the refrigerator for up to 3 days. Reheat them in the oven to keep the cheese crispy. They can also be frozen for up to a month, though the texture may change slightly after thawing.
FAQs About Cheesy Tennessee Onions
Can I Make These Ahead of Time?
Yes! You can prepare the onions and cheese mixture the day before, then bake them when you’re ready to serve. Just make sure to cover the dish tightly with plastic wrap or foil to keep everything fresh.
What Type of Onion Should I Use?
Yellow onions are ideal for this recipe due to their perfect balance of sweetness and flavor. However, if you prefer a sharper taste, red onions can be a good alternative.
Conclusion
Cheesy Tennessee Onions are a simple yet irresistible side dish that brings warmth, comfort, and rich flavor to any meal. With tender onions, melted cheese, and a crispy golden topping, this dish is sure to become a favorite at your dinner table. Whether you’re serving it with a weeknight meal or adding it to your holiday spread, it’s a dish that promises to satisfy every time. Easy to make with just a few pantry staples, these cheesy onions are proof that sometimes the best meals are the simplest. So, give this recipe a try—your taste buds (and your guests) will thank you.
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Cheesy Tennessee Onions – Easy Baked Side Dish Packed With Flavor
- Total Time: 40 minutes
Description
Cheesy Tennessee Onions – a baked side dish with caramelized onions, a blend of sharp cheddar and parmesan, and a golden, crispy topping. This easy-to-make recipe is perfect for weeknight dinners or special occasions.
Ingredients
3 large yellow onions, thinly sliced
2 tablespoons olive oil
1 tablespoon butter
2 cloves garlic, minced
2 cups sharp cheddar cheese, shredded
1/2 cup parmesan cheese, grated
1 teaspoon fresh thyme, chopped (or 1/2 teaspoon dried)
Salt and pepper to taste
Instructions
Preheat the Oven: Preheat your oven to 350°F (175°C).
Prepare the Onions: In a large skillet, heat olive oil and butter over medium heat. Add the sliced onions and sauté for about 8-10 minutes, or until they become soft and golden brown. Add the minced garlic during the last minute and sauté until fragrant.
Mix the Cheese: In a separate bowl, combine the shredded cheddar cheese, grated parmesan, chopped thyme, salt, and pepper. Stir until evenly mixed.
Assemble the Dish: Transfer the sautéed onions into a baking dish. Evenly sprinkle the cheese mixture over the onions. For a crunchier topping, add a layer of breadcrumbs over the cheese.
Bake: Place the dish in the oven and bake for 20-25 minutes, or until the cheese is melted, bubbly, and golden brown on top.
Serve: Let the dish cool for a few minutes before serving. Enjoy these cheesy, savory onions as a side dish to any main course!
- Prep Time: 15 minutes
- Cook Time: 25 minutes
Nutrition
- Serving Size: 6
- Calories: 280
- Fat: 22g
- Carbohydrates: 16g
- Protein: 6g