Tennessee Onions (Cheesy Baked Onion Casserole Recipe)

Tennessee Onions is a classic Southern side dish made with sweet onions, melty cheese, and buttery seasoning. Baked until golden and bubbly, this easy onion casserole is the perfect comfort-food side for steak, BBQ, burgers, and holiday dinners.

⭐ Why You’ll Love Tennessee Onions

• Classic Southern-style side dish

• Loaded with melty, cheesy goodness

• Super easy to make with simple ingredients

• Perfect for potlucks and family dinners

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• 🛒 Ingredients

  • 3 large sweet onions (Vidalia preferred), sliced into rings

  • 2 cups shredded Monterey Jack cheese

  • 1 cup shredded cheddar cheese

  • ½ cup grated Parmesan cheese

  • 4 tbsp unsalted butter, melted

  • ½ tsp garlic powder

  • ½ tsp paprika

  • Salt & black pepper, to taste

  • Optional: fresh parsley for garnish

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  👩‍🍳 Instructions

  1. Preheat oven
     Preheat to 375°F (190°C). Grease a baking dish.

  2. Layer onions
     Spread onion slices evenly in the dish.

  3. Season
     Sprinkle garlic powder, paprika, salt, and pepper over the onions.

  4. Add cheese
     Top with Monterey Jack, cheddar, and Parmesan.

  5. Add butter
     Drizzle melted butter over everything.

  6. Bake
     Cover with foil and bake for 30 minutes. Remove foil and bake another 15–20 minutes until golden and bubbly.

  7. Serve
     Garnish with parsley and serve hot.

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  🥄 Tips for the Best Tennessee Onions

  • Use Vidalia or sweet onions

  • Slice evenly for consistent cooking

  • Let rest 5 minutes before serving

  • Add bacon bits for extra flavor

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  📌 What to Serve with Tennessee Onions

  • Grilled steak or pork chops

  • BBQ chicken

  • Burgers and hot dogs