Name: Baked Onions with Asiago Cheese
Prep time: 15 min
Cook time: 1 h
Total time: 1 h 15 min
Cuisine: American
Ingredients: 6 large yellow or sweet onions; 4 tablespoons unsalted butter; 3 cloves garlic, finely minced; 1 cup chicken or vegetable broth; 6 tablespoons heavy cream; 1 cup grated Asiago cheese; 1 teaspoon salt; 1/2 teaspoon black pepper; 1 tablespoon fresh thyme or parsley, optional garnish

There’s something absolutely magical that happens when onions are slow-roasted in a rich, buttery broth and finished with melty, golden cheese. These Baked Onions with Asiago Cheese are a side dish that steals the show — savory, sweet, and decadently cheesy. Each layer becomes tender and flavorful, soaking up garlic, broth, and a touch of cream, while the Asiago on top forms an irresistible crust.

This recipe is perfect for fall and winter dinners, holiday tables, or when you want to impress guests with something totally unique. It’s a budget-friendly, low-effort dish that transforms simple ingredients into something luxurious. Even self-proclaimed onion skeptics might find themselves going back for seconds.

What Kind of Onions Work Best for Baked Onions with Asiago Cheese?

For this dish, large yellow or sweet onions are ideal. They have the right balance of sugar and moisture to caramelize beautifully and absorb the savory broth. Vidalia onions are a favorite, but any similar variety will work well. The key is to use onions that are large enough to hold their shape during baking.

Ingredients for the Baked Onions with Asiago Cheese

Yellow or Sweet Onions
The base of the dish. Their natural sugars caramelize during roasting, creating a rich, sweet contrast to the salty cheese.

Butter
Melted butter adds richness and helps the onions brown evenly.

Garlic
Finely minced garlic infuses the dish with deep, aromatic flavor.

Chicken or Vegetable Broth
Provides the savory liquid the onions roast in, helping them soften while adding flavor.

Heavy Cream
A splash of cream creates a luscious texture and balances the saltiness of the cheese.

Asiago Cheese
Nutty, salty, and sharp — Asiago is the star topping. It browns and bubbles, creating a golden crust.

Fresh Thyme or Parsley
Optional, but adds a nice herbal finish for freshness.

Salt and Black Pepper
Enhances all the flavors without overpowering them.

How To Make the Baked Onions with Asiago Cheese

Step 1: Prep the Onions

Peel the onions and trim just the root end to keep the base intact. Slice off the top 1/4 of each onion and use a paring knife to carefully hollow out a small cavity in the center. This helps the seasoning and cheese settle in nicely.

Step 2: Sear and Soften

In a large oven-safe skillet or baking dish, melt butter over medium heat. Place onions cut-side down and sear for about 5–7 minutes until golden. Flip them over, add garlic to the pan, and cook for another 2 minutes.

Step 3: Add the Broth and Cream

Pour in chicken or vegetable broth so that the onions are sitting in about 1/2 inch of liquid. Add a splash of heavy cream to each onion cavity. Season with salt and black pepper to taste.

Step 4: Bake Until Tender

Preheat your oven to 375°F (190°C). Cover the pan with foil and bake for 40–45 minutes until the onions are fork-tender.

Step 5: Add the Asiago Cheese

Remove the foil and generously sprinkle grated Asiago cheese over the tops of the onions. Return to the oven uncovered and bake for another 10–15 minutes until the cheese is melted, golden, and bubbling.

Step 6: Finish and Serve

Garnish with fresh thyme or parsley if desired. Serve warm with some of the creamy broth spooned over the top. These pair beautifully with roasted meats or can even stand alone as a vegetarian centerpiece.

How to Serve and Store Baked Onions with Asiago Cheese

These onions are an incredible side dish for roasts, grilled meats, or cozy casseroles. Try pairing them with a holiday ham or a tender pot roast. Their rich, cheesy flavor and silky texture also work well alongside light proteins like grilled chicken or baked fish.

If you’re serving guests, present them right in the baking dish — the golden tops make a rustic, elegant impression.

To store leftovers, let the onions cool completely. Place them in an airtight container and refrigerate for up to 3 days. Reheat gently in the oven at 350°F until warmed through, adding a splash of broth if needed to keep them moist.

Freezing is not recommended, as the texture may become mushy when thawed.

Frequently Asked Questions

How do I keep the onions from falling apart?

Use large, firm onions and avoid over-hollowing the center. Trimming just a small portion of the root end will help them stay upright during baking.

Can I use a different cheese?

Yes! Parmesan, Gruyère, or Fontina all make excellent substitutes. Each will offer its own unique melt and flavor profile.

Can this be made vegetarian?

Absolutely — just swap the chicken broth for a rich vegetable broth to keep it vegetarian-friendly.

What’s the best way to reheat them?

Place in a baking dish with a bit of broth and cover loosely with foil. Bake at 350°F until warmed through, about 15–20 minutes.

Do I need to peel the onions completely?

Yes. Fully peeling them ensures the layers soften evenly and absorb the broth well.

Can I make these ahead of time?

You can prep and sear the onions a day in advance, then bake and top with cheese just before serving for the best texture and flavor.

Want More Cheesy Side Dish Ideas?

If you loved these Baked Onions with Asiago Cheese, you’ll want to try these other rich and comforting favorites from Life with Jam:

Cheesy Cauliflower Patties for a crispy, low-carb bite.
Creamy Garlic Parmesan Tortellini with Sausage and Broccoli when you crave something cozy and filling.
Copycat Cracker Barrel Hashbrown Casserole — a golden, gooey classic.
Cheesy Baked Tortellini with Meat Sauce for a weeknight family dinner.
Creamy Cheesy Garlic Butter Rigatoni with Savory Beef that combines pasta and bold flavor.

Whether you’re planning a big holiday spread or just looking to level up your weeknight dinners, these recipes deliver warm, cheesy satisfaction.

📌 Save this recipe to your Pinterest side dish board so you can find it again next time you’re craving something warm and cheesy.

And I’d love to hear how it turned out for you! Did you use Asiago or try a different cheese? Add bacon bits? Let me know in the comments — we’re all about sharing good food and tips here.

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Baked Onions with Asiago Cheese

Author: Jam Scott
Total Time: 1 hour 15 minutes
Yield: 6 servings
Diet: Vegetarian

Print Recipe

Description

Baked Onions with Asiago Cheese is a warm, buttery side dish that transforms humble onions into a savory showstopper. Roasted in broth and cream until tender, then topped with nutty Asiago cheese, these golden onions are rich, flavorful, and perfect for holidays or cozy nights in.

Ingredients

6 large yellow or sweet onions

4 tablespoons unsalted butter

3 cloves garlic, finely minced

1 cup chicken or vegetable broth

6 tablespoons heavy cream

1 cup grated Asiago cheese

1 teaspoon salt

1/2 teaspoon black pepper

1 tablespoon fresh thyme or parsley, optional garnish

Instructions

1. Preheat oven to 375°F (190°C).

2. Peel the onions and trim only the root end slightly so they stand upright. Cut off the top 1/4 of each onion and carefully scoop a small cavity in the center using a paring knife.

3. In an oven-safe skillet, melt the butter over medium heat. Place onions cut-side down and sear for 5–7 minutes until lightly browned. Flip them upright.

4. Add minced garlic and cook for 2 minutes. Pour broth into the skillet, enough to come halfway up the onions. Add 1 tablespoon of heavy cream into the hollow center of each onion.

5. Season the onions with salt and pepper. Cover the skillet with foil and bake for 40–45 minutes, or until onions are fork-tender.

6. Uncover, top each onion with grated Asiago cheese, and return to the oven uncovered. Bake for another 10–15 minutes until cheese is melted and golden.

7. Garnish with thyme or parsley and serve warm with a spoonful of broth.