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Tennessee Onions

A classic Southern baked onion casserole made with sweet onions, butter, and melted cheeses until golden and bubbly.
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Prep Time 10 minutes
Cook Time 50 minutes
Total Time 1 hour
Servings: 6 servings
Course: Casserole, Side Dish
Cuisine: American, Southern
Calories: 280

Ingredients
  

  • 4 large sweet onions thinly sliced
  • 6 tbsp unsalted butter sliced
  • 1.5 cups cheddar cheese shredded
  • 1 cup mozzarella cheese shredded
  • 1 tsp garlic powder
  • 0.75 tsp salt
  • 0.5 tsp black pepper freshly ground

Equipment

  • Baking dish
  • Knife
  • Cutting board
  • Aluminum foil

Method
 

  1. Preheat oven to 350°F (175°C) and butter a baking dish.
  2. Layer half of the sliced onions in the dish and season with salt, pepper, and garlic powder.
  3. Top with half the butter and half the shredded cheeses.
  4. Repeat layers with remaining onions, seasoning, butter, and cheese.
  5. Cover loosely with foil and bake for 30 minutes.
  6. Uncover and bake an additional 15–20 minutes until golden and bubbly.
  7. Rest for 5 minutes before serving.

Notes

Use sweet onions for best flavor. Can be assembled ahead of time and baked before serving.