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Tennessee Onions

A classic Southern baked onion casserole featuring sweet Vidalia onions layered with butter, spices, and three cheeses for the ultimate comforting side dish.
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Prep Time 10 minutes
Cook Time 40 minutes
Total Time 50 minutes
Servings: 6 servings
Course: Side Dish
Cuisine: American, Southern
Calories: 230
Ingredients Equipment Method Notes

Ingredients
  

Main
  • 4 Vidalia onions thickly sliced
  • 4 tbsp unsalted butter melted
  • 1 tsp garlic powder
  • 1 tsp Italian seasoning
  • 0.5 tsp salt
  • 0.5 tsp black pepper
  • 1 cup mozzarella cheese shredded
  • 1 cup cheddar cheese shredded
  • 0.5 cup Parmesan cheese grated

Equipment

  • Casserole dish
  • Knife
  • Cutting board
  • Measuring spoons

Method
 

  1. Preheat oven to 375°F (190°C).
  2. Slice Vidalia onions into thick rounds and separate into rings.
  3. Arrange onions in a casserole dish.
  4. Pour melted butter evenly over onions.
  5. Season with garlic powder, Italian seasoning, salt, and pepper.
  6. Top with mozzarella, cheddar, and Parmesan cheese.
  7. Bake for 35–40 minutes until onions are tender and cheese is melted and golden.
  8. Rest 5 minutes before serving.

Notes

For extra flavor, add crushed red pepper or substitute smoked cheeses.