There’s something truly comforting about the aroma of roasted onions mingling with melted cheese, and this Tennessee Onion Casserole captures that essence perfectly. I first discovered this delicious dish during a family gathering, where it stole the show amid a feast of favorites. The layers of sweet Vidalia onions and rich, gooey cheese create a delightful symphony of flavors that keeps everyone coming back for seconds.
As the chilly months set in, this casserole becomes a staple in my kitchen, providing not only warmth but also a crowd-pleasing treat that’s simple enough to whip up on a weekday. With just a handful of ingredients, including garlic powder and smoked paprika, you’re only an hour away from mastering a dish that transforms humble onions into a decadent delight.
Whether you’re looking to impress guests at your next potluck or simply craving a satisfying meal when fast food seems like the only option, this Tennessee Onion Casserole is here to rescue your dinner plans. Each bite is a celebration of flavor and comfort, making it the ideal dish for anyone yearning for homemade goodness. Let’s dive into this easy-to-follow recipe!
Why is Tennessee Onion Casserole so special?
Comforting warmth: This casserole encapsulates the cozy vibes of home cooking, making it perfect for chilly evenings.
Rich flavors: The combination of sweet Vidalia onions and melted cheese creates an irresistible savory experience.
Easy to prepare: With only 10 minutes of prep, you can have a flavorful dish in no time!
Crowd-pleaser: Ideal for gatherings, it’s a dish that invites seconds from friends and family.
Versatile delight: Serve it as a side or main dish; it’s sure to impress.Explore more comforting recipes.
Tennessee Onion Casserole Ingredients
• Here’s everything you need to create this delicious dish!
For the Onions
- Vidalia onions – these sweet onions bring a natural sweetness that’s perfect for casseroles.
- Kosher salt – enhances the flavors of the onions and cheese.
- Dry mustard – adds a subtle tang that complements the richness of the dish.
- Garlic powder – infuses the casserole with delicious depth and aroma.
- Smoked paprika – provides a hint of smokiness that elevates the overall flavor.
For the Assembly
- Salted butter – ensures the onions stay moist and adds a luscious richness.
- Shredded havarti cheese – lends creaminess and a mild flavor; divide for layering!
- Shredded sharp cheddar cheese – adds a punch of flavor to the casserole; also divided.
For the Garnish
- Fresh flat-leaf parsley (optional) – provides a pop of color and freshness to finish the dish.
- Freshly ground black pepper – enhances all the flavors with a bit of spice.
This Tennessee Onion Casserole is not only a feast for the senses but also a dish that transforms ordinary ingredients into something extraordinary!
How to Make Tennessee Onion Casserole
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Preheat your oven to 350°F. This warm-up is essential to ensure your casserole cooks evenly and achieves that lovely golden top.
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Combine the sliced onions in a large bowl. Sprinkle with kosher salt, dry mustard, garlic powder, and smoked paprika; toss gently to coat the onions evenly with these flavorful seasonings.
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Arrange the seasoned onions evenly in a 9×13-inch baking dish. This distribution allows for even cooking and makes sure every bite is packed with flavor.
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Top the onions with pieces of salted butter, then sprinkle 1 1/2 cups each of havarti and cheddar cheese on top. Cover the dish with aluminum foil and bake for about 40 minutes, until the onions are soft and the sides are bubbling.
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Uncover the dish and add the remaining 1/2 cup of havarti and 1/2 cup of cheddar cheese on top. Bake uncovered for an additional 30 minutes until the top is beautifully golden brown.
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Broil optionally on high for the last 5 minutes if you prefer a more browned top. Before serving, sprinkle with fresh parsley and a dash of black pepper for an extra burst of flavor.
Optional: Garnish with extra parsley for a touch of freshness.
Exact quantities are listed in the recipe card below.
Make Ahead Options
These Tennessee Onion Casserole is perfect for meal prep enthusiasts looking to save time on busy weeknights! You can slice and season the onions up to 24 hours in advance; simply store them in an airtight container in the refrigerator to keep them fresh and avoid browning. Additionally, you can assemble the entire casserole (excluding the final cheese layer) up to 3 days ahead. When you’re ready to bake, just add the cheese on top and follow the baking instructions as normal. This way, you’ll enjoy a comforting homemade dish that’s just as delicious with minimal effort when you need it most!
How to Store and Freeze Tennessee Onion Casserole
Fridge: Store leftover Tennessee Onion Casserole in an airtight container for up to 3 days, ensuring the flavors stay intact.
Freezer: If you want to save some for later, freeze the casserole in a tightly sealed container for up to 3 months.
Reheating: To reheat, thaw overnight in the fridge. Warm in the oven at 350°F for about 25-30 minutes until heated through, restoring its cheesy goodness.
Covering: When freezing, wrap it tightly in plastic wrap and aluminum foil to prevent freezer burn and maintain quality.
Expert Tips for Tennessee Onion Casserole
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Choose the Right Onions: Opt for Vidalia or sweet onions for the perfect balance of sweetness. Avoid using overly strong onions which may dominate the dish’s flavor.
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Uniform Slices: Cut onions into 1/4-inch-thick rings consistently to ensure they cook evenly. Uneven sizes may lead to some onions being undercooked while others become mushy.
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Layer Wisely: When adding cheese, ensure even layers to maximize gooeyness throughout the casserole. Skipping layers results in a disparity of cheesy goodness.
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Adjust Cooking Times: Oven temperatures can vary; check the onions for softness after 40 minutes. If a deeper color is desired, watch closely while broiling to prevent burning.
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Garnish Creatively: Sprinkle fresh parsley before serving for a dash of color and a fresh flavor contrast. This simple addition elevates your Tennessee Onion Casserole’s presentation.
What to Serve with Tennessee Onion Casserole?
There’s nothing quite like a cozy meal, especially when it features the delightful flavors of sweet, roasted onions and rich, melting cheese.
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Grilled Chicken: A succulent, herb-seasoned grilled chicken pairs beautifully with the creamy casserole, adding protein and a smoky flavor contrast.
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Fresh Garden Salad: Crisp lettuce, juicy tomatoes, and a tangy vinaigrette bring a refreshing balance to the rich casserole, enhancing the overall meal experience.
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Garlic Bread: Warm, buttery garlic bread is a perfect side for soaking up the cheesy goodness. The crunch contrasts wonderfully with the soft casserole.
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Roasted Vegetables: A medley of seasonal roasted veggies offers a colorful, nutritious touch to the table, ensuring every bite is full of flavor and texture.
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Baked Macaroni and Cheese: If you’re looking to double down on comfort food, a creamy baked macaroni and cheese harmonizes well with the casserole’s savory notes.
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Chardonnay: A chilled glass of Chardonnay enhances the meal with its crisp acidity and fruity undertones, making it an excellent pairing.
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Apple Crisp: For dessert, a warm apple crisp adds a sweet finish that contrasts beautifully with the savory main dish, ending your meal on a pleasing note.
Let these pairings elevate your dinner and make every gathering feel special.
Tennessee Onion Casserole Variations
Feel free to unleash your culinary creativity and customize this casserole with these delightful twists!
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Herb-Infused: Add fresh thyme or rosemary to the onion mixture for an aromatic boost that elevates the dish’s flavor profile.
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Spicy Kick: Incorporate diced jalapeños or a dash of cayenne pepper for those who love a little heat in their comfort food.
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Bacon Lovers: Crumble cooked bacon and mix it in with the onions before baking for a savory crunch that adds richness and depth.
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Vegan Option: Substitute with plant-based butter and cheese alternatives to create a dairy-free version the whole family will enjoy.
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Nutty Crunch: Top with crushed breadcrumbs mixed with grated Parmesan before the final bake to create a delightful crunchy topping that contrasts with the softness below.
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Loaded Recipe: Add in cooked spinach or sautéed mushrooms for extra nutrition and a more complex flavor. These additions also give a heartiness to the dish that makes it feel more substantial.
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Different Cheeses: Experiment with different cheese combinations like Gouda or Monterey Jack for unique flavors that suit your palate.
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Sweet Surprise: Drizzle a touch of honey over the top before baking for a sweet contrast to the savory onions, creating a delightful juxtaposition.
Let your taste buds guide you as you explore these variations to make the Tennessee Onion Casserole your own!
Tennessee Onion Casserole Recipe FAQs
What type of onions should I use for Tennessee Onion Casserole?
I highly recommend using Vidalia onions or other sweet onions for this casserole. Their natural sweetness perfectly complements the savory flavors and adds a delightful depth to the overall dish. Avoid strong onions, as they may overpower the lovely balance you’re aiming for.
How should I store leftover Tennessee Onion Casserole?
Absolutely! Store your leftover casserole in an airtight container in the fridge for up to 3 days. If you want to keep it longer, you can freeze it as well. Just make sure to cool it completely before transferring it to an appropriate container.
Can I freeze Tennessee Onion Casserole?
Yes, you certainly can! To freeze, let the casserole cool completely. Wrap it tightly in plastic wrap, followed by aluminum foil to prevent freezer burn. It will keep well in the freezer for up to 3 months. When you’re ready to enjoy it again, simply thaw it overnight in the fridge and heat it at 350°F for about 25-30 minutes until warmed through.
What should I do if my casserole isn’t bubbling or browning?
If you notice that your casserole isn’t bubbling or browning as expected, it could be that the oven temperature wasn’t evenly distributed. Make sure to check it periodically while cooking and broil it on high for the last 5 minutes if you prefer a deeper golden color on top. This step should help bring out that luscious, bubbly finish!
Is Tennessee Onion Casserole suitable for vegetarians?
Yes! This casserole is very much suitable for vegetarians since it contains no meat. However, if you’re concerned about allergies, always double-check your cheese labels as some might contain animal rennet. It’s a delightful, cheesy dish that can satisfy everyone at the table!
Can I add other ingredients to customize my Tennessee Onion Casserole?
Definitely! Feel free to mix in some cooked bacon or sausage for meat lovers or add sautéed mushrooms for a different flavor profile. You can also try incorporating different cheese varieties to experiment with flavors. The more the merrier with this flexible dish!
Savory Tennessee Onion Casserole That Everyone Will Love
Ingredients
Equipment
Method
- Preheat your oven to 350°F.
- Combine the sliced onions in a large bowl. Sprinkle with kosher salt, dry mustard, garlic powder, and smoked paprika; toss gently to coat the onions evenly.
- Arrange the seasoned onions evenly in a 9x13-inch baking dish.
- Top the onions with pieces of salted butter, then sprinkle 1 1/2 cups each of havarti and cheddar cheese on top. Cover with aluminum foil and bake for about 40 minutes.
- Uncover the dish and add the remaining 1/2 cup of havarti and 1/2 cup of cheddar cheese on top. Bake uncovered for an additional 30 minutes until the top is beautifully golden brown.
- Optionally broil on high for the last 5 minutes if you prefer a more browned top.
- Before serving, sprinkle with fresh parsley and a dash of black pepper.