Why You’ll Love This Recipe
Tennessee Onions are a comforting Southern side dish made by layering sweet onions with a blend of cheeses and seasonings, then baking until golden and bubbly. This simple, cheesy, and savory bake pairs perfectly with grilled meats, burgers, or barbecue and is especially beloved for its rich flavor and ease of preparation.
ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
Vidalia or other sweet onionsbuttergarlic powderonion powderItalian seasoningmozzarella cheesecheddar cheesemonterey jack cheesesaltblack pepper
directions
Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking dish.
Peel and slice the onions into thick rings.
Arrange the onion slices in an even layer in the prepared baking dish.
Sprinkle garlic powder, onion powder, Italian seasoning, salt, and pepper evenly over the onions.
Top with slices or shreds of butter scattered evenly across the dish.
Sprinkle the mozzarella, cheddar, and Monterey Jack cheeses generously over the top.
Cover the dish with foil and bake for 30 minutes.
Remove the foil and continue baking for an additional 15-20 minutes, or until the cheese is golden and bubbly.
Let rest for a few minutes before serving.
Servings and timing
This recipe serves 6-8.Preparation time: 10 minutesBaking time: 45-50 minutesTotal time: 55-60 minutes
Variations
Add crumbled cooked bacon on top before baking for extra flavor.
Use a mix of red and sweet onions for added color and taste.
Include a layer of crushed Ritz crackers or breadcrumbs for a crunchy topping.
Try adding a splash of Worcestershire sauce for depth.
storage/reheating
Store leftovers in an airtight container in the refrigerator for up to 4 days.Reheat in the oven at 350°F for about 15 minutes or microwave individual portions for 1-2 minutes until hot.
FAQs
What type of onion is best for Tennessee Onions?
Sweet onions like Vidalia are ideal for their mild flavor and natural sweetness.
Can I make Tennessee Onions ahead of time?
Yes, assemble the dish a day in advance and refrigerate until ready to bake.
Can I freeze this dish?
Freezing is not recommended as the texture of the onions and cheese may change.
What cheese works best?
A blend of mozzarella, cheddar, and Monterey Jack offers great melt and flavor, but feel free to use your favorites.
Is this dish spicy?
No, it’s mild and savory, but you can add crushed red pepper flakes if you like heat.
What can I serve this with?
Great with grilled steak, chicken, pork chops, or as a hearty side for burgers.
Can I use pre-shredded cheese?
Yes, but freshly grated cheese melts better and has superior flavor.
Why is my dish watery?
Make sure to slice onions thickly and avoid overbaking which may draw out too much moisture.
Can I add herbs?
Absolutely—try thyme or rosemary for an aromatic twist.
How do I prevent the cheese from burning?
Cover with foil for the first part of baking, then uncover to brown at the end.
Conclusion
Tennessee Onions bring out the best of Southern comfort with their savory, cheesy, and melt-in-your-mouth texture. Easy to prepare and endlessly versatile, this dish is perfect for family dinners or potlucks. Once you try it, you’ll find yourself making it again and again as a go-to favorite.
Print
Tennessee Onions
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Total Time: 55 minutes
- Yield: 8 servings
- Category: Side Dish
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Description
A sweet and savory Southern side dish made by baking layers of sweet onions with butter, spices, and a mix of cheeses until bubbly and golden.
Ingredients
- 3–4 large sweet onions (Vidalia preferred), sliced into 1/4 inch rings
- 4 tbsp unsalted butter, cut into small pats
- 1/2 tsp salt
- 1 tsp garlic powder
- 1/2 tsp dried oregano
- 1/2 tsp dry mustard
- 1/4 tsp cayenne pepper
- 1 cup shredded sharp cheddar cheese
- 1 cup shredded mozzarella or smoked Gouda
- 1/2 cup grated Parmesan cheese
Instructions
- Preheat oven to 350°F (175°C) and grease a 9×13 inch baking dish.
- Slice onions into 1/4 inch rings and separate into individual layers.
- Layer the onions evenly in the baking dish and sprinkle with salt, garlic powder, oregano, dry mustard, and cayenne pepper.
- Dot the top with butter pieces.
- Evenly sprinkle cheddar, mozzarella or Gouda, and Parmesan over the onions.
- Cover with foil and bake for 35–40 minutes until onions are soft and cheese is melted.
- Optional: uncover and bake for an additional 5–10 minutes for a browned, bubbly top.
- Serve warm as a side dish or topping.
Notes
- Vidalia or similar sweet onions give the best flavor.
- Smoked Gouda adds a rich, smoky twist if desired.
- Uncover the dish briefly to crisp the cheese topping.
- Great with grilled meats or as a burger topping.
- Leftovers keep well in the fridge for 3–4 days.