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–+ servings
Tennessee Onions

Tennessee Onions

A delicious casserole featuring sweet Vidalia onions, creamy cheese, and a blend of spices, perfect as a side dish or comfort food.
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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 4 servings
Calories 300 kcal

Equipment

  • 9x13 inch baking dish
  • large bowl

Ingredients
  

Onions and Seasoning

  • 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

Cheeses

  • 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

Other Ingredients

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

Miscellaneous

  • cooking spray

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 1 ½ teaspoons kosher salt, 1 teaspoon dry mustard powder, 1 teaspoon garlic powder, 1 teaspoon smoked paprika, and ¼ teaspoon cayenne pepper, and toss to coat.

Layering

  • 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 1 ¼ ounces grated Parmesan cheese. Scatter 4 tablespoons diced unsalted butter on top.

Baking

  • 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 2 tablespoons 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: 300kcalCarbohydrates: 22gProtein: 8gFat: 22gSaturated Fat: 12gPolyunsaturated Fat: 1gMonounsaturated Fat: 10gCholesterol: 50mgSodium: 700mgPotassium: 300mgFiber: 2gSugar: 4gVitamin A: 200IUVitamin C: 10mgCalcium: 250mgIron: 1mg
Keyword casserole, cheesy onions, comfort food, Tennessee Onions, vegetable side, Vidalia onions
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