
Southern Comfort on a Plate
After years of testing this Tennessee Onions recipe is pure magic in my kitchen. The sweet onions melt into a rich cheesy sauce creating something so incredible you'll forget it's just a side dish.

Why This Recipe Works
The beauty here is in its simplicity. Once those onions get all tender and the cheese turns golden brown you've got something that steals the show every time. Even onion skeptics come back for seconds.
Ingredients You’ll Need
- Sweet Onions: Vidalia onions are the gold standard for their natural sweetness, but Walla Walla or even Maui onions work too.
- Heavy Cream: Adds richness and binds everything together.
- Mozzarella and Parmesan: The ultimate duo for creamy and tangy layers.
- Butter: For that luscious flavor and a perfect golden finish.
- Garlic Powder and Smoked Paprika: Subtle yet transformative spices that elevate every bite.
- Fresh Parsley: A sprinkle for freshness and a burst of color.
Step-by-Step Instructions
- Prepare the Ingredients
- Peel and slice your onions evenly to ensure they cook at the same rate. Gather your spices, cheese, and cream for easy assembly.
- Layering Perfection
- In a greased baking dish, alternate layers of onions, cheese, and cream mixture for even flavor distribution.
- Bake to Perfection
- Cover with foil and bake at 375°F for 30 minutes. Remove the foil and bake another 15 minutes until bubbly and golden.
- Rest and Serve
- Let the dish sit for 5 minutes to settle the layers, then sprinkle with parsley for a picture-perfect finish.
Pro Tips for Success
Thinly slice your onions for faster cooking and better layering. If your onions are particularly juicy, pat them dry with a paper towel before layering to avoid a watery dish.
Flavor Variations
Add crumbled bacon for a smoky twist, or use Gruyere cheese for a nuttier flavor. For spice lovers, sprinkle in some red pepper flakes or a dash of hot sauce.
Best Pairings
Tennessee Onions shine alongside grilled steaks, roasted chicken, or barbecue ribs. For a vegetarian meal, pair it with garlic bread and a crisp green salad.

Storage and Reheating
Store leftovers in an airtight container in the fridge for up to three days. Reheat in the oven at 350°F until warmed through for the best results.
Make It Ahead
Prepare the dish up to the baking step and refrigerate overnight. Add an extra 10-15 minutes of bake time when cooking straight from the fridge.
Why You'll Love This Recipe
This dish transforms humble onions into a luxurious side that's perfect for any occasion. It's comforting, crowd-pleasing, and so simple to make.
Gourmet Touches
For an elevated presentation, layer caramelized onions with the raw slices for added depth. A sprinkle of truffle oil before serving adds a luxurious touch.
Freezing Instructions
This dish freezes wonderfully. Assemble it in a foil pan, cover tightly, and freeze for up to three months. Bake directly from frozen at 375°F for an hour.
A Crowd Favorite
Whenever I bring this dish to potlucks, it’s always the first to disappear. People are always amazed that something so simple can taste so decadent.
Frequently Asked Questions
- → What type of onions work best?
- Sweet onions like Vidalia or Walla Walla are ideal for their mild, sweet flavor. Yellow onions can work as a substitute but will have a stronger taste.
- → Can I make this ahead?
- Yes, assemble the dish a day ahead and refrigerate. When ready to serve, bake according to the recipe instructions.
- → What should I serve with Tennessee Onions?
- They pair perfectly with grilled steaks, chicken, or pork. Also great alongside mashed potatoes or on crusty bread.
- → Can I use different cheeses?
- Yes, try Gruyere or sharp cheddar for different flavor profiles. Just ensure one cheese is good for melting.
- → Why cover with foil while baking?
- Foil helps the onions steam and become tender. Removing it for the final cooking time allows the cheese to brown and bubble.