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Tennessee Onions

Published: Feb 13, 2025 · Modified: May 7, 2025 by Jennifer · This post may contain affiliate links · Leave a Comment

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Savor the Southern Charm: Tennessee Onions

Embark on a culinary journey to the heart of Southern cooking with this Tennessee Onions recipe, a delightful casserole that combines sweet onions with rich, cheesy goodness. Perfect for a cozy family dinner or as a standout side at your next potluck, this dish brings a touch of Southern hospitality right to your table.

Tennessee Onions

Ideal for anyone looking to impress with minimal effort, this recipe is straightforward yet yields incredibly flavorful results. Ready to add a new favorite to your recipe collection? Let’s get started with this simple and rewarding dish.

Rich and Cheesy: Your New Favorite Onion Casserole

This Tennessee Onions casserole isn’t just about the sweet onions; it's about how they meld beautifully with the creamy, smoky flavors of cheddar and Gouda. This dish is a deep dive into comfort food, easily mastered with a few key steps.

Here’s how to create a casserole that’s as inviting as it is delicious, complete with tips to make sure it’s perfect every time.

Pro Tips for Perfect Tennessee Onions:

  1. Evenly Sliced Onions: Ensure your onions are cut into uniform slices to promote even cooking.
  2. Proper Seasoning: Layer the herbs and spices evenly to fully enhance the natural sweetness of the onions.
  3. Cheese Choices: Using a combination of mild Cheddar and smoked Gouda offers a balance of flavor and creaminess.
  4. Cover While Baking: Keep the dish covered for the first part of baking to soften the onions without drying them out.
  5. Golden Finish: Remove the cover towards the end to allow the top layer of cheese to achieve a beautiful golden crust.
Tennessee Onions

Tennessee Onions Casserole Recipe:

  • Preparation time: 15 minutes
  • Cooking time: 70 minutes
  • Servings: 6
  • Equipment: Oven, 13x9 inch baking dish, aluminum foil

With this dish, you’ll bring a piece of Southern culinary tradition into your home, sure to be a hit at any dining table.

Ingredients:

  • Cooking spray
  • 2 ½ lbs sweet onions, sliced into ¼-inch thick rings
  • 1 teaspoon dried thyme
  • 1 teaspoon dried parsley flakes
  • 1 teaspoon garlic salt
  • ½ teaspoon dried oregano
  • ½ teaspoon dry mustard
  • ¼ teaspoon cayenne pepper
  • ¼ cup salted butter, cut into thin slices
  • 4 oz mild Cheddar cheese, shredded
  • 4 oz smoked Gouda cheese, shredded

Directions:

  1. Preheat and Prepare: Warm your oven to 350°F. Coat a 13x9 inch baking dish with cooking spray.
  2. Season the Onions: In a large bowl, combine the onion rings with thyme, parsley, garlic salt, oregano, mustard, and cayenne pepper. Toss gently to coat evenly.
  3. Arrange in Dish: Transfer the seasoned onions to the prepared baking dish, spreading them out evenly.
  4. Add Cheese and Butter: Distribute slices of butter over the onions and sprinkle evenly with both cheeses.
  5. Bake Covered: Cover the dish with aluminum foil and bake until the onions are tender and the sides are bubbly, about 40 minutes.
  6. Finish Uncovered: Remove the foil and continue baking until the top is golden brown, about 30 additional minutes.

Ready to Serve!

This Tennessee Onions casserole is more than just a side dish; it’s a warm welcome to anyone who tastes it. Enjoy the melting cheeses, the tender onions, and the subtle kick of spices that make this dish uniquely comforting and utterly delicious.

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With this dish, you’ll bring a piece of Southern culinary tradition into your home, sure to be a hit at any dining table.

  • Total Time: 1 hour 25 minutes
  • Yield: 6 1x

Ingredients

Scale
  • Cooking spray
  • 2 ½ lbs sweet onions, sliced into ¼-inch thick rings
  • 1 tsp dried thyme
  • 1 tsp dried parsley flakes
  • 1 tsp garlic salt
  • ½ tsp dried oregano
  • ½ tsp dry mustard
  • ¼ tsp cayenne pepper
  • ¼ cup salted butter, cut into thin slices
  • 4 oz mild Cheddar cheese, shredded
  • 4 oz smoked Gouda cheese, shredded

Instructions

  • Preheat and Prepare: Warm your oven to 350°F. Coat a 13x9 inch baking dish with cooking spray.
  • Season the Onions: In a large bowl, combine the onion rings with thyme, parsley, garlic salt, oregano, mustard, and cayenne pepper. Toss gently to coat evenly.
  • Arrange in Dish: Transfer the seasoned onions to the prepared baking dish, spreading them out evenly.
  • Add Cheese and Butter: Distribute slices of butter over the onions and sprinkle evenly with both cheeses.
  • Bake Covered: Cover the dish with aluminum foil and bake until the onions are tender and the sides are bubbly, about 40 minutes.
  • Finish Uncovered: Remove the foil and continue baking until the top is golden brown, about 30 additional minutes.
  • Author: Jennifer
  • Prep Time: 15 minutes
  • Cook Time: 70 minutes
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