Baked Tennessee Onions Delight

These Baked Tennessee Onions transform simple sweet onions into a crowd-pleasing side dish full of rich, cheesy flavor. Thick rings of Vidalia or Walla Walla onions are layered with butter and seasonings, then covered with a melty cheese blend and baked until golden and tender. Perfect for BBQs, holiday meals, or whenever you want a comforting addition that complements everything from grilled meats to roasts.

I first made this dish for a backyard cookout and it disappeared before anyone could grab seconds. Now it’s always requested when friends come over.

Ingredients

• Sweet onions: 3 to 4 large such as Vidalia or Walla Walla sliced thickly for a tender, melt-in-your-mouth texture
• Unsalted butter: 3 tablespoons cut into small pieces to evenly dot the onions and add richness
• Shredded cheese: 1 and a half cups (cheddar, mozzarella, Monterey Jack or a blend) for gooey, melting goodness
• Garlic powder: Half a teaspoon to add a subtle savory note to the onions
• Smoked paprika: Half a teaspoon for a gentle smoky depth. Try to find a good quality Spanish smoked paprika if you can
• Salt and black pepper: to taste to bring out the onions’ natural sweetness and balance the flavors
• Grated Parmesan cheese: 2 tablespoons to add a sharp, nutty finish (optional but highly recommended)
• Chopped fresh parsley: for garnish to brighten the dish before serving

Step-by-Step Instructions

Preheat and Prep:

Preheat your oven to 375 degrees Fahrenheit (190 degrees Celsius). Lightly grease a baking dish with butter or non-stick spray to prevent sticking and help with browning.

Slice the Onions:

Peel your onions and slice them into half-inch thick rings. Separate the rings carefully so you get full circles and layer them evenly in the greased baking dish. This even layering ensures every bite is loaded with onion.

Season and Add Butter:

Sprinkle the layered onions evenly with garlic powder, smoked paprika, salt and black pepper. Then dot small pieces of butter across the top of the onions to help caramelize them while baking and add richness.

Add Cheese:

Generously sprinkle the shredded cheese over the onions to cover their surface. For an extra layer of flavor, add a light dusting of grated Parmesan cheese on top of the shredded cheese.

Bake:

Cover the dish loosely with foil and bake for 25 minutes. Remove the foil and continue baking for another 15 to 20 minutes or until the cheese is bubbly, golden, and slightly crisp on top and the onions are tender.

Serve:

Optionally garnish with fresh parsley for color and an herbaceous contrast. Serve the dish hot alongside grilled meats, burgers or your favorite casserole recipes.

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Storage Tips

Store leftovers in an airtight container in the refrigerator for up to three days. To reheat, bake uncovered at 350 degrees Fahrenheit for 10 to 15 minutes until warmed through or microwave in short bursts until hot.

Ingredient Substitutions

If you cannot find sweet onions use yellow onions but expect a sharper taste. Feel free to add cooked bacon or sausage on top before baking for added savory richness. Cheese combinations are versatile try cheddar with mozzarella for the best melt or add Monterey Jack for creaminess.

Serving Suggestions

These onions shine alongside BBQ chicken or ribs. They also make an amazing topping for grilled burgers or act as a creamy, cheesy side for roast beef or pork. Pair with classic Southern sides like cornbread, baked beans, and coleslaw for a complete hearty plate.

Cultural Context

This recipe nods to Southern comfort food traditions that highlight simple ingredients elevated through slow cooking and bold flavors. Onions and cheese are staples in many Southern kitchens and this baked rendition offers a crowd-pleasing update to classic casseroles.

Pro Tips

• Toast the smoked paprika lightly in a dry pan before baking to really awaken its smoky aroma
• Slice the onions evenly to ensure consistent cooking and texture throughout the dish
• Allow the casserole to rest five minutes after baking so it sets up nicely and is easier to serve without falling apart

Common Recipe Questions

→ Can I use other onion types?

Yes, but sweet onions like Vidalia or Walla Walla are best for their mild, natural sweetness which balances the cheese and spices well.

→ What cheese works best for melting?

Cheddar and mozzarella melt beautifully, adding creaminess. Monterey Jack can be included for extra smoothness and mild flavor.

→ Is it possible to prep ahead?

Absolutely. Assemble the layers and seasonings in the dish, cover, and refrigerate up to a day before baking to save time.

→ Can I add meat like bacon or sausage?

Yes, cooked and crumbled bacon or sausage adds a savory twist complementing the sweet onions and cheese.

→ How should leftovers be stored and reheated?

Store in an airtight container in the fridge for up to 3 days. Reheat in the oven at 350°F for 10-15 minutes until warm and bubbly for best texture.