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–+ servings
Tennessee Onions

Tennessee Onions

Tennessee Onions are a flavorful casserole made with layers of sweet onions, cheese, and spices, perfect for serving 8 to 10.
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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 10 servings
Calories 290 kcal

Equipment

  • 9x13 inch baking dish

Ingredients
  

Base Ingredients

  • 3 pounds Vidalia or sweet onions about 4 large, 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
  • 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
  • 4 tablespoons unsalted butter (½ stick), diced
  • 2 tablespoons finely chopped fresh parsley leaves for garnish (optional)

Instructions
 

Cooking Instructions

  • 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.
  • 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.
  • 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.

Nutrition

Serving: 1portionCalories: 290kcalCarbohydrates: 15gProtein: 9gFat: 22gSaturated Fat: 13gPolyunsaturated Fat: 1gMonounsaturated Fat: 8gCholesterol: 50mgSodium: 700mgPotassium: 200mgFiber: 1gSugar: 3gVitamin A: 500IUVitamin C: 8mgCalcium: 300mgIron: 1mg
Keyword baked onions, cheese, comfort food, onion casserole, Tennessee Onions, vegetable
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