# Tennessee Onion Casserole

This is a delicious Tennessee Onion Casserole recipe that is a keeper, got from the New York Times cooking app.

- Total time: 75 min
- Cuisine: American
- Category: Side
- Language: en

## Ingredients

- 3 pounds sweet onions
- 2 teaspoons salt
- 1 teaspoon black pepper
- 1 teaspoon smoked paprika
- 1 teaspoon granulated garlic
- 1 teaspoon dry mustard
- 2 teaspoons brown sugar
- 0.5 teaspoon cayenne
- 1 teaspoon fresh thyme leaves
- 2 tablespoons good quality olive oil
- 4 ounces Tillamook mild cheddar cheese
- 4 ounces Gruyère cheese
- 0.5 cup Pecorino Romano cheese
- 3 tablespoons butter

## Instructions

1. Peel and slice 3 pounds of sweet onions on a mandoline to about a quarter of an inch thick, ensuring they are uniform and thin.
2. Toss all the sliced onions together in a bowl to break up the rings.
3. Prepare the spice blend by combining 2 teaspoons of salt, 1 teaspoon of black pepper, 1 teaspoon of smoked paprika, 1 teaspoon of granulated garlic, 1 teaspoon of dry mustard, 2 teaspoons of brown sugar, 0.5 teaspoon of cayenne, and 1 teaspoon of fresh thyme leaves in a bowl.
4. Mix the spice blend together.
5. Drizzle 2 tablespoons of good quality olive oil over the sliced onions.
6. Toss the onions with the olive oil to coat them.
7. Sprinkle about half of the spice and herb mixture over the onions.
8. Toss the onions with your hands to distribute the spice mixture evenly.
9. Sprinkle the remaining half of the spice mixture over the onions.
10. Toss the onions again to ensure even coating.
11. Grease a 13x9 baking dish.
12. Place a layer of seasoned onions on the bottom of the baking dish.
13. Add 2 ounces of freshly grated Tillamook mild cheddar cheese over the onion layer.
14. Add 2 ounces of freshly grated Gruyère cheese over the cheddar.
15. Add another layer of seasoned onions on top of the cheeses.
16. Add another 2 ounces of freshly grated Tillamook mild cheddar cheese.
17. Add the remaining 2 ounces of freshly grated Gruyère cheese.
18. Sprinkle about a half cup of freshly grated Pecorino Romano cheese on top.
19. Dot the top with a total of 3 tablespoons of butter cut into small pieces.
20. Tightly cover the baking dish with foil.
21. Bake in the oven at 350 degrees Fahrenheit for 45 minutes.
22. Remove the foil after 45 minutes.
23. Return the casserole to the oven for another 30 minutes until golden brown and bubbly.

## Equipment

- mandoline
- bowl
- 13x9 baking dish
- oven

## Tips

- The onions should be uniformly and thinly sliced for a silky texture, not crunchy.
- You can use either light or dark brown sugar.
- You can use sharp cheddar instead of mild cheddar.
- You can also use Parmigiano-Reggiano or Grana Padano instead of Pecorino Romano cheese.

## Source

- Original video: https://www.instagram.com/reel/DRKacp8jXaZ/?igsh=MWd0d3Bkam1jMnNxOQ==
- Recipe page: https://www.cliprecipe.com/recipe/01ebe014-f681-4667-84bd-5cb973696a92
- Extracted: 2025-11-21

Extracted from the video by Clip Recipe (https://www.cliprecipe.com). Quantities and steps are as stated or shown in the video. Site guide for agents: https://www.cliprecipe.com/llms.txt