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50 min
|
easy
This cheesy baked Tennessee onions casserole turns simple sweet Vidalia onions into the most irresistible, melty side dish.
The onions roast low and slow in butter and spices, then get smothered in three kinds of cheese for big comfort-food flavor.
It’s perfect for holiday dinners, potlucks, or any night you want an easy, crowd-pleasing side that steals the spotlight.
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Set your oven rack to the center position for even browning.
Preheat the oven to 375°F.
Lightly grease a 9x13-inch baking dish with butter or cooking spray.
Peel the onions, trim the ends, and slice them into ½-inch thick rounds if not already cut.
Separate the slices into rings, keeping some rounds mostly intact for a pretty presentation.
Spread the onion rings in the baking dish in a snug single layer, overlapping slightly as needed.
In a small bowl, combine the melted butter and vegetable bouillon powder.
Stir in the salt, black pepper, garlic powder, smoked paprika, and fresh thyme leaves.
Taste a tiny dab and adjust the seasoning if you prefer a saltier or smokier casserole.
Drizzle the seasoned butter evenly over the onions, making sure to reach the edges and corners.
In a separate bowl, toss together the cheddar, mozzarella, and Parmesan cheeses.
Sprinkle the cheese mixture evenly over the onions, covering them generously but in a fairly even layer.
Cover the dish tightly with foil and bake for 20 minutes to let the onions soften.
Remove the foil and continue baking for 15 minutes, or until the cheese is browned and bubbling.
Let the casserole rest for 5 to 10 minutes before serving so the cheese sets slightly.
| Energy | 276 | kcal |
|---|---|---|
| Protein | 13 | g |
| Total Fat | 21 | g |
| Carbohydrates | 8 | g |
| Dietary Fiber | 1 | g |
* Approximate, per serving.
Data source: USDA FoodData Central.
This casserole brings steakhouse vibes to weeknight dinners or holiday buffets with almost no effort.
Try pairing it with grilled steak, roast chicken, or juicy burgers, and add a crisp green salad for balance.
For a fun twist, scatter cooked crumbled bacon or a few jalapeño slices on top before the final minutes of baking.
These main dishes are a great match for this recipe.
Post your review and pictures below! ⬇︎ Thanks for your review!
Cheri, Sacramento, CA: I did make it. Flavor wise it is great but the onions still had some crunch and it was kind of a mess to serve up.
: Glad the flavor worked for you. Slice thinner, bake covered first, and let it rest 10 minutes for softer onions and cleaner servings.
Geraldine: Eunice's recipe was fantastic! My whole family loved a new side dish, which I feel doesn't happen that often :) I forgot the thyme, but it still tasted great. I added a little extra sprinkle of parmesan on top just before baking the rest of the cheese. Really really delish--and easy.
: Glad it was a hit, Geraldine!
Doris, Houston, TX: This Tennessee Onions recipe is terrific! Super quick and easy to throw together. However, I did add a little extra garlic powder, some cooked and crumbled bacon, and a few jalapeno slices. I also used dried thyme instead of fresh only because I ran out. Defiantly adding this recipe to my recipe book!
: Glad it worked well for you, Doris; bacon and jalapeño are great add-ins, and dried thyme is a perfectly fine swap!
Nicholas Hill, Salt Lake City, UT: Perfectly sweet and tender onions under that bubbly golden cheese layer, and the smoked paprika and thyme made it extra delicious
: Happy it worked out, Nicholas! The smoked paprika and thyme are such a nice little upgrade on that cheesy onion bake.
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