Tennessee Onions

The aroma of sweet onions caramelizing in the oven fills the kitchen, creating a warm and inviting atmosphere. Tennessee Onions is a delightful side dish that takes just about 35 minutes from start to finish, and the combination of cheeses brings a savory depth that perfectly complements the onions. It’s an easy recipe that celebrates the sweet, rich flavor of onions while adding a cheesy twist.

This recipe is perfect for family dinners or potlucks, offering a delicious way to elevate any meal. It’s an excellent option for those who love cheesy side dishes and can be easily made ahead of time to save on prep during busy days.

Why You’ll Love This Recipe

• The combination of three cheeses creates a rich, creamy topping.
• Sweet onions caramelize beautifully, enhancing their natural flavor.
• It’s a quick bake, making it perfect for weeknight dinners.
• The dish is incredibly versatile, pairing well with various main courses.

What You’ll Need

Gather these simple ingredients to get started.

For the Onions

• 4 medium sweet onions, sliced

For the Toppings

• 4 tbsp butter, dotted
• 1 cup mozzarella cheese, shredded
• 1 cup cheddar cheese, shredded
• ½ cup Parmesan cheese, grated

Use unsalted butter for better flavor control.

Substitutions & Swaps

• Use any onion variety for a different taste.
• Swap mozzarella for provolone cheese.
• Replace cheddar with Gouda cheese.
• Use nutritional yeast for a dairy-free option.

How to Make It

Begin by preparing your baking dish and ingredients.

Preheat

Preheat the oven to 350°F (175°C). This ensures an even bake for your dish.

Layer

Slice the sweet onions and layer them in a baking dish. Make sure they are evenly distributed for consistent cooking.

Dot

Dot the onions with butter. This will help the onions to caramelize as they bake.

Sprinkle

Sprinkle mozzarella, cheddar, and Parmesan cheese over the onions. The mix of cheeses will create a delicious crust.

Bake

Bake in the preheated oven until the cheeses are bubbly and golden, about 25-30 minutes. Keep an eye on them toward the end for perfect browning.

Serve

Serve hot as a side dish. Enjoy the gooey, cheesy goodness right out of the oven.

How to Store It

Fridge: store in an airtight container for up to 3 days.
Freezer: no, cheese texture changes after freezing.
Reheat: microwave on medium for 1-2 minutes.

Tips for Best Results

• Choose onions that feel firm and heavy for the best flavor.
• Don’t skimp on the cheese; it makes all the difference in taste.
• Allow the dish to sit for a few minutes after baking for easier serving.
• Adjust cheese types based on your personal preference for unique flavor profiles.

Serving Suggestions

• Pair with grilled meats for a hearty meal.
• Serve alongside barbecue dishes for a summer cookout.
• Enjoy with a fresh green salad for a balanced dinner.