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Cheesy and Delicious Tennessee Onion Casserole Recipe

This Tennessee Onion Casserole is a crowd-pleasing dish that is perfect for any occasion. The combination of sweet onions, butter, and a blend of three types of cheese creates a savory and flavorful dish that will have everyone asking for seconds.
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Prep Time 5 minutes
Cook Time 30 minutes
Servings: 8
Course: Appetizer, Side Dish
Cuisine: American
Calories: 150
Ingredients Method Notes

Ingredients
  

  • 3-4 sweet onions sliced into ¼ inch rounds (700g)
  • 4 tablespoons butter 56g
  • 1 teaspoon salt or to taste (5g)
  • 1 teaspoon garlic powder 2g
  • 1/2 teaspoon oregano 1g
  • 1 cup shredded Italian blend cheese 113g
  • 1 cup shredded cheddar cheese 113g
  • ½ cup shredded parmesan cheese 56g

Method
 

  1. Preheat the oven to 350°F (180°C) and spray a 9x13 inch baking dish with non-stick cooking spray.
  2. Slice the sweet onions into ¼ inch rounds and separate the rings.
  3. Arrange the onion rings in the baking dish and sprinkle them with salt, garlic powder, and oregano.
  4. Place pats of butter evenly over the onions.
  5. Sprinkle the Italian blend and cheddar cheese over the onions, and top with parmesan cheese.
  6. Bake for 35-40 minutes or until the cheese is melted and bubbly and the onions are tender.
  7. Serve hot and enjoy!

Notes

You can use any type of sweet onion, but Vidalia onions work particularly well.
You can use any type of cheese that melts well in this recipe, such as mozzarella or provolone.
To make this recipe vegetarian, you can use a plant-based butter substitute.