Tennessee Onions (Cheesy Baked Side Dish)

Sweet, melty, and oh-so-delicious these Tennessee Onions are everything you love about cheesy comfort food. Perfect for busy families or potluck nights, this easy recipe takes minutes to prepare and turns simple onions into a crave-worthy side dish.

With buttery layers of sweet onions, mozzarella, provolone, and Parmesan, every bite is creamy, savory, and slightly caramelized better than onion rings and just as addictive!

Ingredients You’ll Need

• 3-4 sweet onions (Vidalia or yellow), sliced ½ inch thick
• 3 tbsp butter, cut into small pats
• 1 tsp Italian seasoning
• Salt and pepper, to taste
• 1 cup shredded mozzarella cheese
• 4-6 slices provolone cheese
• ¼ cup grated Parmesan cheese

Print

Step-by-Step Instructions

Step 1: Preheat the oven
Preheat your oven to 375°F (190°C). Lightly butter a baking dish to keep the onions from sticking and to add a rich, buttery flavor.

Step 2: Prepare the onions
Peel and slice your sweet onions into ½-inch thick rounds. Separate the rings gently with your hands so the layers cook evenly.

Step 3: Layer in the baking dish
Arrange the onion slices in a single, even layer in your prepared dish. Try not to overlap too much this helps everything bake evenly.

Step 4: Season and add butter
Sprinkle the onions generously with salt, pepper, and Italian seasoning. Add small pats of butter across the top so it melts down into the layers while baking.

Step 5: Add the cheeses
Sprinkle a layer of shredded mozzarella over the onions. Then place slices of provolone on top, finishing with a sprinkle of grated Parmesan cheese for that golden crust.

Step 6: Bake until golden
Place the dish uncovered in the oven and bake for 25-30 minutes, or until the top is bubbly and lightly browned. For extra crispiness, broil for 2 minutes at the end.

Step 7: Let rest and serve
Remove from the oven and allow the dish to rest for 5 minutes before serving. This helps the cheese set slightly and makes scooping easier.

This recipe is part of our Trending Budget Eats Collection discover more trending comfort food recipes here.

Pro Tip

• Use sweet onions like Vidalia or yellow onions their natural sweetness caramelizes beautifully when baked, creating that irresistible flavor.
• Shred your own cheese for the best melt and texture. Pre-shredded cheese often contains anti-caking agents that prevent smooth melting.
• Want extra flavor? Sprinkle a little garlic powder or smoked paprika between the layers for a savory boost.
• Make it lighter: Use part-skim mozzarella and a smaller amount of butter if you’d like a slightly lower-fat version.
• For the perfect finish: Broil the top for the last 1-2 minutes to get that bubbly, golden cheese crust that looks straight out of a restaurant.

Why You’ll Love This Recipe

• Simple ingredients, big flavor: Just onions, butter, and cheese no complicated steps.
• Quick to prepare: Only about 10 minutes of hands-on time before it goes in the oven.
• Perfect for family dinners: Everyone from kids to adults will love the mild, cheesy sweetness.
• Versatile side dish: Pairs perfectly with chicken, steak, fish, or vegetarian mains.
• Budget-friendly comfort food: A cozy, crowd-pleasing dish made from affordable pantry staples.

Storage & Meal Prep

To Store:
Let your Tennessee Onions cool completely. Transfer them to an airtight container and refrigerate for up to 3 days.

To Reheat:
Warm leftovers in a 350°F oven for 10-12 minutes until the cheese melts and the edges turn bubbly again. For a faster option, microwave individual portions for 1-2 minutes, though the oven keeps the texture crispier.

To Make Ahead:
Assemble the dish completely (without baking), cover tightly with foil or plastic wrap, and refrigerate for up to 24 hours. When ready to bake, uncover and cook as directed adding an extra 5 minutes if baking directly from the fridge.

To Freeze:
You can freeze it before baking. Wrap well in plastic wrap and foil, then freeze for up to 1 month. Thaw overnight in the fridge before baking.

Meal Prep Tip:
Portion leftovers into small containers for quick reheatable sides during the week they go great with grilled chicken, roasted veggies, or a fresh salad.

There’s something magical about how a few simple ingredients onions, butter, and cheese can come together to create a dish this comforting. Tennessee Onions are proof that you don’t need fancy ingredients or hours in the kitchen to make something everyone will love.

Whether you’re serving them at Sunday dinner, a holiday meal, or just alongside your favorite main dish, these cheesy baked onions will disappear fast!

If you try this recipe, leave a comment or tag it on Pinterest I’d love to see your version!
Don’t forget to save this recipe to your favorite Pinterest board so you can make it again and again.

FAQ