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Cheesy Baked Tennessee Onions

Cheesy Baked Tennessee Onions: Southern Comfort in Every Bite

Cheesy Baked Tennessee Onions is a comforting Southern casserole combining sweet, tender onions and rich cheeses, making it a perfect crowd-pleaser.
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Prep Time 15 minutes
Cook Time 1 hour 15 minutes
Resting Time 10 minutes
Total Time 1 hour 40 minutes
Servings: 6 servings
Course: Dinner
Cuisine: Southern
Calories: 350
Ingredients Equipment Method Nutrition Notes

Ingredients
  

For the Casserole
  • 6 medium Sweet Onions Using Vidalia onions is highly recommended for optimal flavor.
  • 1 teaspoon Kosher Salt
  • 1 teaspoon Dry Mustard Powder
  • 1 teaspoon Garlic Powder
  • 1 teaspoon Smoked Paprika
  • ¼ teaspoon Cayenne Pepper optional
  • 2 cups Mild Cheddar Cheese
  • 1 cup Smoked Gouda or Smoked Cheddar
  • 1 cup Parmesan Cheese
  • 4 tablespoons Unsalted Butter
  • ¼ cup Fresh Parsley optional, for garnish

Equipment

  • 9x13-inch baking dish
  • Mixing Bowl
  • knife
  • cutting board

Method
 

Step‑by‑Step Instructions
  1. Preheat your oven to 350°F (175°C) and grease a 9x13-inch baking dish with cooking spray.
  2. Slice the sweet onions into ¼-inch rounds and place them in a large mixing bowl. Sprinkle in kosher salt, dry mustard powder, garlic powder, smoked paprika, and cayenne if desired. Toss until onions are coated.
  3. Layer half of the seasoned onions in the prepared baking dish. Spread them out evenly. Sprinkle half of the mild cheddar and smoked Gouda cheeses on top.
  4. Top with the remaining seasoned onions, spreading evenly. Sprinkle the rest of the cheddar, Gouda, and all Parmesan cheese over the onions.
  5. Cut the unsalted butter into small pieces and scatter evenly over the cheese layer.
  6. Cover the baking dish tightly with aluminum foil and bake for 45 minutes.
  7. After 45 minutes, remove the foil and bake uncovered for an additional 30 minutes until cheese is melted and golden brown.
  8. Once out of the oven, sprinkle fresh parsley on top for garnish. Serve hot.

Nutrition

Serving: 1servingCalories: 350kcalCarbohydrates: 15gProtein: 12gFat: 25gSaturated Fat: 15gCholesterol: 60mgSodium: 800mgPotassium: 450mgFiber: 2gSugar: 4gVitamin A: 500IUVitamin C: 10mgCalcium: 350mgIron: 1mg

Notes

Allow the casserole to sit for 5-10 minutes after baking for better texture and easier serving. Store leftovers in an airtight container in the refrigerator for up to 4 days.

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