Creamy Baked Onions with Asiago Cheese

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Caramelized, tender, and bubbling with cheese, these Creamy Baked Onions with Asiago Cheese are the ultimate comfort side dish. Picture sweet onions roasted until golden, then nestled in a bath of creamy, cheesy sauce and baked until the tops are perfectly crispy and browned. This dish turns the humble onion into a show-stopping favorite that will have everyone asking for seconds.

Whether you’re making a cozy weeknight meal or setting the table for a holiday gathering, this recipe fits right in. The creamy asiago sauce clings to each layer of onion, making every bite rich and flavorful. Serve it alongside a roast or enjoy it as a vegetarian main — it’s a warm hug on a plate.

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Why You’ll Love This Creamy Baked Onions with Asiago Cheese

This dish is incredibly easy to make yet looks and tastes like something from a fine dining restaurant. The combination of sweet roasted onions and sharp, nutty Asiago cheese is absolutely addictive. It’s a creative way to serve a vegetable that’s often overlooked and transforms it into something elegant and crave-worthy.

Perfect for make-ahead prep, this recipe can be assembled in advance and baked just before serving. It’s naturally gluten-free and customizable — you can add herbs, swap cheeses, or even tuck in breadcrumbs on top for extra crunch.

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What Kind of Onions Work Best for This Dish?

For best results, use large yellow or sweet onions like Vidalia. Their natural sugars caramelize beautifully during baking, which balances the sharpness of the cheese. You can also use white onions for a milder flavor or red onions for a slightly more intense taste and a pop of color. Just make sure they’re firm and uniform in size so they cook evenly.

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Ingredients for the Creamy Baked Onions with Asiago Cheese

Each ingredient in this dish plays a vital role in creating layers of savory, creamy, and cheesy goodness. Here’s what you’ll need:

• Large Yellow or Sweet Onions – The star of the show. Their natural sweetness intensifies during baking and creates a soft, melt-in-your-mouth texture.
• Heavy Cream – Adds richness and forms the luscious base of the sauce that bathes the onions.
• Asiago Cheese – This semi-hard cheese melts beautifully and offers a sharp, nutty flavor that perfectly contrasts the sweet onions.
• Butter – Used to sauté and add a golden richness to the onions.
• Garlic – Brings a layer of deep aromatic flavor.
• Fresh Thyme or Dried Herbs – A touch of herbs balances the creamy richness with an earthy note.
• Salt and Pepper – Essential seasonings to enhance and balance the flavors.
• Optional: Parmesan Cheese – For an extra golden topping and added umami.

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How To Make the Creamy Baked Onions with Asiago Cheese

This dish comes together with just a few simple steps. The oven does most of the work, transforming these basic ingredients into something spectacular.

Step 1: Prep the Onions

Peel and trim the onions, then slice them in half horizontally. You can also keep them whole if they are small. Blanch them briefly in boiling water for 4–5 minutes to soften and reduce sharpness.

Step 2: Sauté Garlic and Butter

In a small saucepan, melt butter and gently sauté minced garlic until fragrant. Add a touch of fresh thyme or herbs and stir to infuse flavor into the butter.

Step 3: Arrange and Pour

Place the prepped onions cut-side up in a greased baking dish. Pour the garlic herb butter evenly over them, then pour in the heavy cream so it surrounds the onions, not covering them entirely.

Step 4: Add Cheese

Sprinkle generously with shredded Asiago cheese and a bit of Parmesan if using. Make sure some cheese falls between the onions and some sits on top to form that irresistible golden crust.

Step 5: Bake to Perfection

Bake uncovered at 375°F (190°C) for about 35–40 minutes or until the onions are tender, and the tops are bubbling and golden brown. Broil for the last 2–3 minutes for extra crispiness.

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Serving and Storing Creamy Baked Onions with Asiago Cheese

This dish is ideal for dinner parties, holiday spreads, or even a cozy weeknight meal. One batch serves 4 to 6 people, depending on portion size and what you’re serving alongside.

Serve them hot, straight from the oven, as a decadent side dish or even a vegetarian main. The rich flavor profile pairs wonderfully with roasted meats, grains, and salads.

To store: Let the onions cool completely, then transfer them to an airtight container. Store in the refrigerator for up to 3 days. To reheat, warm in a 350°F oven for 10–15 minutes until heated through.

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What to Serve With Creamy Baked Onions with Asiago Cheese

H3: Herb-Crusted Roast Chicken

The juicy roast and herby flavors balance the richness of the onions perfectly.

H3: Garlic Mashed Potatoes

Creamy on creamy — this is indulgent but irresistible. The textures complement each other nicely.

H3: Grilled Steak

A juicy grilled ribeye or sirloin offers a hearty counterpart to the cheesy, soft onions.

H3: Roasted Root Vegetables

Add color and earthy depth to your plate with roasted carrots, parsnips, or beets.

H3: Wild Rice Pilaf

The nutty, chewy texture of wild rice offers contrast and a touch of wholesomeness.

H3: Balsamic Glazed Brussels Sprouts

The tangy-sweet balsamic glaze adds a punch of brightness to balance the creaminess.

H3: Crusty Bread or Baguette

For sopping up every drop of that rich, cheesy cream sauce.

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Frequently Asked Questions

Can I use another type of cheese besides Asiago?
Absolutely! Parmesan, Gruyère, or even Fontina work beautifully in this dish. Just aim for a cheese that melts well and has bold flavor.

Can I make this recipe ahead of time?
Yes, you can prep the onions and assemble the dish up to one day in advance. Cover and refrigerate, then bake when ready to serve.

Are these baked onions vegetarian?
Yes — as long as you use a vegetarian-friendly cheese, this dish is entirely meat-free.

Can I freeze leftovers?
It’s not recommended. Cream-based dishes can separate when frozen and reheated, affecting texture and flavor.

How do I make this dish lighter?
Swap the heavy cream for half-and-half or use a mix of milk and a bit of flour to thicken. Use less cheese or a lighter cheese like part-skim mozzarella.

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And let me know in the comments how yours turned out. Did you add breadcrumbs for a crunchy topping? Maybe swapped in Gruyère? I love hearing how you make these recipes your own. Your questions and tweaks help us all cook better together.

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Conclusion

Creamy Baked Onions with Asiago Cheese may sound simple, but the flavors and textures are anything but basic. It’s a wonderful blend of sweet, savory, creamy, and crisp. This dish brings elegance and warmth to any table, making it a must-try whether you’re cooking for family or guests.

Bring these golden, cheesy onions to your next meal and watch them disappear — you’ll never look at onions the same way again!

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