Tennessee Cheesy Baked Onions

Name: Tennessee Cheesy Baked Onions Casserole
Prep time: 15 min
Cook time: 50 min
Total time: 1 h 5 min
Yield: 6 servings
Cuisine: American
Ingredients: 3 large sweet onions, thinly sliced; 1 tsp garlic powder; 1 tsp dried parsley; 1 tsp paprika; 1/4 tsp white pepper; 1/4 tsp cayenne pepper; Seasoned salt, to taste; Ground black pepper, to taste; 2 cups shredded cheddar cheese; 2 cups shredded mozzarella cheese; 1/4 cup grated Parmesan cheese; 4 tbsp unsalted butter, sliced into pats; Butter or non-stick cooking spray, for greasing; 1 tbsp fresh parsley, chopped for garnish

Tennessee Cheesy Baked Onions is a rich, savory casserole that layers thinly sliced sweet onions with a blend of cheddar, mozzarella, and parmesan cheese, seasoned with garlic and paprika. It's a warming comfort-food side dish with melted cheese and buttery depth.

🌍American 🏷️Baked onions 🏷️Onion casserole 🏷️Tennessee onions 🏷️Cheesy onions Side dish

🏷️

🏷️Comfort food

-0:00

dinnerin321onTikTok

Total

1h 5m

Servings

6

Difficulty

Easy

Est. Cost

$26–$43

Recipe Source

View original recipe

From TikTok · by dinnerin321

-0:00

dinnerin321onTikTok

Ingredients

3 large sweet onions, thinly sliced
1 tsp garlic powder
1 tsp dried parsley
1 tsp paprika
1/4 tsp white pepper
1/4 tsp cayenne pepper
Seasoned salt, to taste
Ground black pepper, to taste
2 cups shredded cheddar cheese
2 cups shredded mozzarella cheese
1/4 cup grated Parmesan cheese
4 tbsp unsalted butter, sliced into pats
Butter or non-stick cooking spray, for greasing
1 tbsp fresh parsley, chopped for garnishoptional

14 Ingredients

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Instructions

1
Preheat your oven to 350°F (175°C).
2
Thinly slice the sweet onions using a mandoline or a sharp knife.
3
In a large bowl, combine the sliced onions with garlic powder, dried parsley, paprika, white pepper, and cayenne pepper. Season with seasoned salt and black pepper.
4
Toss well to ensure the onions are evenly coated with the spices.
5
Grease a 9x13-inch baking dish with butter or non-stick cooking spray.
6
Spread half of the seasoned onions in an even layer in the prepared dish.
7
Sprinkle half of the shredded cheddar and half of the shredded mozzarella over the onions.
8
Top with the remaining onions, followed by the rest of the cheddar, mozzarella, and all of the grated Parmesan cheese.
9
Arrange the pats of unsalted butter evenly over the top of the cheese. Finish with another light sprinkle of seasoned salt.
10
Cover the baking dish tightly with aluminum foil.
11
Bake for 30-40 minutes, or until the onions are tender.
12
Carefully remove the foil and return the dish to the oven. Bake uncovered for another 15-20 minutes, until the top is golden brown and bubbly.
13
Let it rest for a few minutes, then garnish with fresh parsley before serving.

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Tips & Notes

Pro tips

Slice onions uniformly to ensure even cooking; use a mandoline for consistency and speed.
Don't skip the paprika and cayenne—they add depth and a subtle warmth that balances the cheese richness.
Layer cheese between onions, not just on top, so it distributes throughout and binds the casserole as it bakes.
Cover with foil for the first 30 minutes to keep the onions moist; uncover to let the top brown and crisp in the final 10–15 minutes.