Creamy Baked Onions with Asiago Cheese

Hey y'all! Ready to indulge in the ultimate comfort food twist? These Creamy Baked Onions with Asiago Cheese are rich, melt-in-your-mouth tender, and loaded with a nutty, golden cheesy crust. This crowd-pleasing dish is a delicious addition to holiday feasts, family dinners, or even a cozy date night in. Let's get cooking!

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Why You’ll Love This

• The creamy sauce and melted Asiago cheese create a luscious, decadent flavor.
• Perfect as a unique side dish or vegetarian entrée for special occasions.
• Simple ingredients and easy prep make it beginner-friendly.
• Aromatic thyme and garlic add depth and sophistication.
• Make-ahead and reheating options make this dish party-perfect!

Ingredients

• 4 large yellow onions, peeled and halved
• 2 tablespoon unsalted butter
• 2 cloves garlic, minced
• 1 cup heavy cream
• ½ cup whole milk
• ¾ cup grated Asiago cheese (plus extra for topping)
• ¼ cup grated Parmesan cheese
• ¼ teaspoon ground nutmeg
• 1 teaspoon fresh thyme leaves (or ½ teaspoon dried thyme)
• ½ teaspoon salt
• ¼ teaspoon black pepper
• 2 tablespoon panko breadcrumbs (optional, for topping)
• Fresh parsley, chopped (for garnish)

Directions

1. Prep the Onions

1. Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish.
2. Bring a large pot of salted water to a boil. Carefully add the onion halves and simmer for 10 minutes until just tender. Drain and set aside to cool slightly.

2. Make the Creamy Sauce

3. In a saucepan, melt the butter over medium heat. Add the minced garlic and sauté until fragrant, about 1 minute.
4. Stir in the heavy cream and milk. Heat until just simmering, then add Asiago cheese, Parmesan cheese, nutmeg, thyme, salt, and black pepper. Stir constantly until cheese is melted and the sauce is smooth, 2-3 minutes. Remove from heat.

3. Assemble & Bake

5. Arrange the onion halves cut side up in the prepared baking dish.
6. Pour the creamy cheese sauce evenly over the onions. Sprinkle extra Asiago cheese and panko breadcrumbs on top if desired.
7. Bake for 30-35 minutes, or until the top is golden brown and bubbly.
8. Let cool for 5 minutes. Garnish with chopped parsley before serving.

Notes

• For extra flavor, use a mix of sweet yellow and red onions.
• Add a pinch of cayenne for subtle heat.
• If you prefer a thicker sauce, let it simmer for an extra 2-3 minutes before pouring over the onions.

Variations

• Gruyère Swap: Substitute Gruyère cheese for Asiago for a creamier, mellow finish.
• Bacon Lover’s: Sprinkle cooked, crumbled bacon on top before baking.
• Vegan Version: Use plant-based cream, vegan cheese, and olive oil instead of dairy and butter.

Required Equipment

• Large pot
• 9x13-inch baking dish
• Medium saucepan
• Wooden spoon
• Knife and cutting board

Storage Instructions

• Store leftovers in an airtight container in the refrigerator for up to 3 days.
• Reheat in a 350°F (175°C) oven for 10-12 minutes until warmed through.
• Not recommended for freezing, as the creamy sauce may separate.

Suggested Pairings & Serving Recommendations

• Pair with roast chicken, baked ham, or grilled steak for a hearty meal.
• Serve alongside a crisp green salad and crusty bread.
• Makes a stunning vegetarian main with wild rice or a herby quinoa side.

Pro Tips

• Blanching the onions beforehand ensures they bake up sweet and tender.
• Use freshly grated cheese for the smoothest, best-melting results.
• Broil for 2 minutes at the end if you like a deeply golden, crunchy topping.

FAQ

Can I make this dish ahead of time?

Yes! Assemble up to the baking step, cover, and refrigerate for up to 24 hours; allow to come to room temperature before baking.

What kind of onions are best?

Large yellow onions offer a sweet, mellow flavor, but you can use red or sweet Vidalia onions as well.

Can I use pre-shredded cheese?

Pre-shredded cheese works in a pinch, but freshly grated cheeses melt smoother and taste richer in the sauce.

★★★★★ 4.20 from 32 ratings

Creamy Baked Onions with Asiago Cheese

yield: 4 servings

prep: 20 mins

cook: 45 mins

total: 50 mins

Tender baked onions enveloped in a rich, creamy Asiago cheese sauce, finished with a golden topping and fresh herbs. Perfect as a comforting side dish for dinner.

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🖨️ Print Pin Recipe

Ingredients

• 4 large yellow onions, peeled and halved
• 2 tablespoon unsalted butter
• 2 cloves garlic, minced
• 1 cup heavy cream
• ½ cup whole milk
• ¾ cup grated Asiago cheese (plus extra for topping)
• ¼ cup grated Parmesan cheese
• ¼ teaspoon ground nutmeg
• 1 teaspoon fresh thyme leaves (or ½ teaspoon dried thyme)
• ½ teaspoon salt
• ¼ teaspoon black pepper
• 2 tablespoon panko breadcrumbs (optional, for topping)
• Fresh parsley, chopped (for garnish)

Instructions

1. 1
   Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish.
2. 2
   Bring a large pot of salted water to a boil. Carefully add the onion halves and simmer for 10 minutes until just tender. Drain and set aside to cool slightly.
3. 3
   In a saucepan, melt the butter over medium heat. Add the minced garlic and sauté until fragrant, about 1 minute.
4. 4
   Stir in the heavy cream and milk. Heat until just simmering, then add Asiago cheese, Parmesan cheese, nutmeg, thyme, salt, and black pepper. Stir constantly until cheese is melted and the sauce is smooth, 2-3 minutes. Remove from heat.
5. 5
   Arrange the onion halves cut side up in the prepared baking dish.
6. 6
   Pour the creamy cheese sauce evenly over the onions. Sprinkle extra Asiago cheese and panko breadcrumbs on top if desired.
7. 7
   Bake for 30-35 minutes, or until the top is golden brown and bubbly.
8. 8
   Let cool for 5 minutes. Garnish with chopped parsley before serving.

CLICK FOR NUTRITION INFO ↑

Approximate Information for One Serving

Serving Size: 1 serving

Calories: 385cal

Protein: 10 gg

Fat: 30 gg

Saturated Fat: 0g

Trans Fat: 0g

Cholesterol: 0mg

Sodium: 0mg

Potassium: 0mg

Total Carbs: 21 gg

Fiber: 0g

Sugar: 0g

Net Carbs: 0g

Vitamin A: 0

Vitamin C: 0mg

Calcium: 0mg

Iron: 0mg

Nutrition Disclaimers

Number of total servings shown is approximate. Actual number of servings will depend on your preferred portion sizes.

Nutritional values shown are general guidelines and reflect information for 1 serving using the ingredients listed, not including any optional ingredients. Actual macros may vary slightly depending on specific brands and types of ingredients used.

To determine the weight of one serving, prepare the recipe as instructed. Weigh the finished recipe, then divide the weight of the finished recipe (not including the weight of the container the food is in) by the desired number of servings. Result will be the weight of one serving.

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