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Cheesy Baked Tennessee Onions Recipe

  • Author: Nina Johnson
  • Prep Time: 10 minutes
  • Cook Time: 30 minutes
  • Total Time: 40 minutes
  • Yield: Serves 4-6 1x
  • Category: Side Dish

Description

A comforting Southern classic, these cheesy baked onions are sweet, savory, and layered with melted goodness. Perfect as a hearty side or standalone indulgence, this dish turns simple ingredients into an irresistibly rich bite of homestyle flavor.


Ingredients

Scale

34 large sweet onions (Vidalia or similar)

2 tablespoons butter, cut into small pieces

Salt and pepper, to taste

1 teaspoon garlic powder

1 teaspoon dried or fresh thyme

1 cup shredded mozzarella

1 cup shredded Gruyère or Swiss cheese

1/4 cup heavy cream (optional)

1/3 cup grated Parmesan cheese


Instructions

  1. Preheat oven to 375°F (190°C).
  2. Peel and slice onions into ½-inch thick rings.
  3. Butter a cast iron skillet or baking dish and arrange onion rings, slightly overlapping.
  4. Season with salt, pepper, garlic powder, and thyme.
  5. Distribute butter pieces evenly over the onions.
  6. Top with mozzarella and Gruyère cheese. Drizzle with heavy cream if using.
  7. Bake uncovered for 25-30 minutes, until onions are tender and cheese is golden and bubbly.
  8. Remove from oven, sprinkle with Parmesan, and let sit for 5 minutes before serving.