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Tennessee Onions

Tennessee Onions

A delicious casserole made with Vidalia onions, cheese, and spices, known as Tennessee Onions.
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Prep Time 15 minutes
Cook Time 1 hour 15 minutes
Total Time 1 hour 30 minutes
Course Side Dish
Cuisine American
Servings 8 servings
Calories 290 kcal

Equipment

  • Oven
  • baking dish
  • Large Bowl

Ingredients
  

Onion Mixture

  • 3 pounds Vidalia or sweet onions cut crosswise into ¼-inch-thick slices
  • 1.5 teaspoons kosher salt
  • 1 teaspoon dry mustard powder
  • 1 teaspoon garlic powder
  • 1 teaspoon smoked paprika
  • 0.25 teaspoon cayenne pepper optional

Cheese

  • 4 ounces mild cheddar cheese shredded (about 1 cup), divided
  • 4 ounces smoked Gouda or cheddar cheese shredded (about 1 cup), divided
  • 1.25 ounces grated Parmesan cheese about ⅓ cup store-bought grated

Butter and Garnish

  • 4 tablespoons unsalted butter diced (½ stick)
  • 2 tablespoons finely chopped fresh parsley leaves for garnish (optional)

Instructions
 

Preparation

  • Heat the oven to 350ºF. Lightly coat a 9x13-inch baking dish with cooking spray. Separate 3 pounds sliced Vidalia onions into rings and place in a large bowl. Add kosher salt, dry mustard powder, garlic powder, smoked paprika, and cayenne pepper, and toss to coat.
  • Arrange half of the onion rings in an even layer in the baking dish. Sprinkle evenly with 2 ounces shredded mild cheddar cheese and 2 ounces shredded smoked Gouda cheese (about ½ cup each).
  • Arrange the remaining onions on top and sprinkle with the remaining 2 ounces each shredded mild cheddar and smoked Gouda. Sprinkle evenly with grated Parmesan cheese. Scatter diced unsalted butter on top.
  • Cover the baking dish with aluminum foil. Bake until the onions are softened and the casserole is bubbling, about 45 minutes. Uncover and bake until the cheese on top is melted and browned in spots, about 30 minutes more. Sprinkle with finely chopped fresh parsley leaves if desired.

Notes

Tennessee onions are best eaten fresh from the oven, but you can refrigerate leftovers in an airtight container for up to 4 days.

Nutrition

Serving: 1servingCalories: 290kcalCarbohydrates: 14gProtein: 7gFat: 22gSaturated Fat: 13gPolyunsaturated Fat: 1gMonounsaturated Fat: 7gTrans Fat: 1gCholesterol: 50mgSodium: 750mgPotassium: 300mgFiber: 1gSugar: 3gVitamin A: 500IUVitamin C: 10mgCalcium: 250mgIron: 1mg
Keyword cheesy onions, Comfort Food, onion casserole, Tennessee Onions, vegetable dish, Vidalia onions
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