Viral Onion Chips

These Viral Onion Chips are crispy, cheesy, savory, and ridiculously easy to make. Thinly sliced onions are covered with Parmesan cheese and seasonings, then baked until the cheese turns golden and crisp around the edges and the onions become sweet and caramelized.

If you’ve seen crispy onion chips all over social media and wondered whether they’re actually worth making, this is one of those simple recipes that’s perfect when you’re craving something salty and crunchy.

The combination of roasted onion and crispy Parmesan is so good, and you only need a handful of ingredients to make an entire tray.

Eat them straight from the pan, dip them in ranch or spicy mayo, serve them alongside burgers and sandwiches, or add them to a snack board. If you love crispy cheese and roasted onions, you’re going to want to try these.

What Are Viral Onion Chips?

Viral onion chips are a simple baked snack made by combining thin slices of onion with shredded or grated cheese.

As everything bakes, the onion softens and caramelizes while the cheese melts, spreads, and eventually becomes crispy.

Once they cool for a few minutes, the cheese firms up even more, creating little savory chips with a tender, sweet onion center and crunchy Parmesan edges.

They’re almost like a combination of an onion ring and a Parmesan crisp—without breading or deep frying.

Why You’ll Love This Recipe

There are plenty of reasons these onion chips became such a fun viral recipe.

They’re incredibly easy.

You don’t need to bread individual onion rings or stand over a pot of hot oil.

Everything goes onto one baking sheet and into the oven.

They’re also easy to customize with different seasonings and dipping sauces.

And if you’re an onion lover, baking them until caramelized brings out their natural sweetness and makes them even better.

Ingredients

1 large yellow or sweet onion
1 1/2 cups freshly shredded Parmesan cheese
1 tablespoon olive oil
1/2 teaspoon garlic powder
1/2 teaspoon onion powder
1/2 teaspoon smoked paprika
1/4 teaspoon black pepper
Pinch of salt, optional
Chopped parsley, optional

For Serving

Ranch dressing
Spicy mayo
Garlic aioli
Ketchup
Burger sauce

How to Make Viral Onion Chips

Step 1: Prepare the Oven

Preheat your oven to 400°F.

Line a large baking sheet with parchment paper.

Parchment makes cleanup easier and helps you lift the crispy cheese from the baking sheet once the onion chips have cooled.

Step 2: Slice the Onion

Peel the onion and slice it into thin rounds, approximately 1/4-inch thick.

Try to keep the slices fairly even so they cook at approximately the same rate.

Gently separate the onion rounds.

You can leave some of the rings together to create larger onion chips.

Step 3: Season the Onion

Place the onion slices in a bowl.

Drizzle with olive oil and sprinkle with garlic powder, onion powder, smoked paprika, and black pepper.

Toss gently until the onion is lightly coated.

Go easy on additional salt because Parmesan cheese is already quite salty.

Step 4: Add the Parmesan

Make small piles of Parmesan cheese on the prepared baking sheet.

Each pile should be slightly larger than the onion slice you’re placing on top.

Place an onion round over each pile of Parmesan.

Sprinkle a little additional Parmesan over the top of each onion.

This creates crispy cheese underneath and over the onions.

Step 5: Bake

Bake for approximately 15 to 20 minutes, or until the onions are tender and the Parmesan is deeply golden around the edges.

Watch them closely toward the end of the cooking time.

You want the cheese golden and crisp, but not burned.

Step 6: Let Them Cool

Remove the baking sheet from the oven and let the onion chips sit for about 5 to 10 minutes.

Don’t immediately try to pick them up.

The melted Parmesan will continue to firm and become crisp as it cools.

Once they’re firm enough to lift, transfer the onion chips to a serving platter and enjoy.

The Secret to Crispy Onion Chips

One of the most important parts of this recipe happens after the chips come out of the oven.

Let them cool.

When Parmesan is piping hot, it’s still soft and flexible. As it cools, it becomes much crispier.

If you pick up an onion chip immediately and think it isn’t crunchy enough, give it another few minutes.

The edges should become crisp while the center stays slightly softer because of the onion.

What Kind of Onion Is Best?

I love using a sweet onion for these because roasting brings out even more sweetness.

Yellow onions are also excellent.

You can use:

Sweet onions
Yellow onions
Red onions
White onions

Red onion chips would be especially pretty and have a slightly different flavor.

You could even make a tray using several types of onions and see which one you like best.

How Thin Should I Slice the Onions?

Aim for approximately 1/4-inch slices.

If they’re extremely thick, the onion may still be too firm when the Parmesan has finished browning.

If they’re paper thin, they can cook very quickly and may become overly dark around the edges.

The most important thing is keeping your slices fairly consistent.

A mandoline can help, but a sharp kitchen knife works perfectly well.

Fresh Parmesan vs. Pre-Shredded Parmesan

For the best flavor and texture, I prefer freshly shredded or grated Parmesan.

Fresh Parmesan tends to melt nicely and creates those beautiful crispy edges.

Pre-shredded Parmesan can work, but some packaged cheeses contain anti-caking ingredients that affect how smoothly they melt.

Avoid the shelf-stable powdered Parmesan for this particular recipe if you want that classic melted-cheese crisp.

Can I Use Other Cheese?

Absolutely.

Parmesan is especially good because it becomes crisp as it bakes, but you can experiment with other cheeses.

Try:

Parmesan
Asiago
Pecorino Romano
Cheddar
Pepper Jack
A Parmesan and cheddar mixture

Keep in mind that different cheeses contain different amounts of moisture and fat, so the final texture may vary.

Spicy Onion Chips

It’s really easy to make these spicy.

Add crushed red pepper flakes or cayenne pepper to the seasoning mixture.

You could also sprinkle the onions with Cajun seasoning before baking.

For even more heat, serve them with spicy mayo or jalapeño ranch.

Ranch Onion Chips

If you love ranch seasoning, sprinkle a small amount over the onions before baking.

Parmesan, onion, and ranch are a fantastic combination.

Serve them with additional ranch dressing for dipping.

Garlic Parmesan Onion Chips

For extra garlic flavor, increase the garlic powder or sprinkle the onions with a little roasted garlic seasoning.

Once they’re baked, add chopped fresh parsley over the top.

You get a garlic-Parmesan flavor that’s especially good with creamy dipping sauce.

Everything Bagel Onion Chips

Sprinkle a little everything bagel seasoning over the onions before baking.

Because both Parmesan and everything bagel seasoning can contain plenty of salt, don’t add additional salt until you’ve tasted the finished chips.

What to Dip Onion Chips In

These are delicious on their own, but dipping sauce makes them even better.

Try them with:

Ranch
Spicy ranch
Garlic aioli
Spicy mayo
Burger sauce
Chipotle mayo
Honey mustard
Ketchup
Barbecue sauce

I especially like something creamy because it balances the salty Parmesan and caramelized onion.

Can I Make Onion Chips in the Air Fryer?

Yes, although you’ll probably need to make smaller batches.

Line the air fryer basket with an air fryer-safe parchment liner, making sure it’s properly weighed down with food according to your air fryer’s instructions.

Arrange Parmesan and onion slices in a single layer.

Air fry around 375°F, checking frequently after about 7 minutes.

Because air fryers vary considerably, watch the cheese carefully and remove the chips once the Parmesan is golden and the onions are tender.

Allow them to cool before serving.

Why Aren’t My Onion Chips Crispy?

There are a few possible reasons.

First, they may simply need more time to cool.

Hot Parmesan is soft. Give the chips 5 to 10 minutes before deciding whether they’re crispy enough.

Second, the cheese may not have baked long enough. Look for deep golden edges.

The onion itself will also remain softer than the Parmesan. These aren’t going to have the exact texture of a thin potato chip. The crispiness comes primarily from the baked cheese surrounding the onion.

Can I Make These Ahead?

Onion chips are best shortly after baking because that’s when the Parmesan is at its crispiest.

You can slice the onions ahead of time and have your cheese and seasonings ready.

Then assemble and bake the chips shortly before you want to serve them.

How to Store Leftovers

If you have leftovers, allow them to cool completely and store them in an airtight container in the refrigerator.

They will soften as they’re stored because of the moisture in the onions.

To bring back some of the crispiness, reheat them briefly in the oven or air fryer rather than the microwave.

What to Serve With Onion Chips

These make a great snack or appetizer, but they’re also a fun alternative to fries or traditional onion rings.

Serve them with:

Cheeseburgers
Sliders
Grilled chicken
Steak
Sandwiches
Hot dogs
Chicken tenders
Wings

You could also put them on a game day appetizer board with several dipping sauces.

Tips for the Best Viral Onion Chips

Slice the onions evenly. This helps everything cook at the same rate.

Don’t make the slices too thick. You want the onions tender by the time the cheese is crispy.

Use enough Parmesan. The crispy cheese is what creates the “chip.”

Don’t oversalt. Parmesan already brings plenty of salty flavor.

Watch the edges. Cheese can go from beautifully golden to burned fairly quickly.

Let them cool. This is essential for getting crispy Parmesan.

Serve them fresh. They’re best shortly after they’re made.

Jennie’s Thoughts

I completely understand why recipes like these become popular because they take something incredibly ordinary and turn it into a snack you wouldn’t necessarily think to make.

And if you already love onions, this is such an easy recipe.

I love the way the onion gets sweeter as it roasts while the Parmesan around it becomes salty and crispy. You get the softer caramelized onion in the middle and those crunchy cheese edges around the outside.

They’re also so much easier than homemade onion rings. There’s no flour, egg wash, bread crumbs, or pot of frying oil.

I would serve these straight from the baking sheet with a bowl of ranch or spicy mayo and probably have a hard time leaving them alone.

If you’ve been seeing viral onion chips everywhere and wondering whether you should try them, grab an onion and some Parmesan and make a tray.

Frequently Asked Questions

Are onion chips actually crispy?

The Parmesan surrounding the onion becomes crispy as it bakes and cools. The onion itself remains somewhat tender and caramelized.

What cheese is best for onion chips?

Parmesan is one of the best choices because it melts and becomes crisp as it cools.

Can I use red onions?

Yes. Red, yellow, white, and sweet onions can all be used.

Do I need to fry onion chips?

No. These onion chips are baked in the oven, so you don’t need a deep fryer.

Why do I need to let them cool?

The melted cheese firms and becomes considerably crispier as it cools.

Can I reheat onion chips?

Yes. For the best texture, reheat them in the oven or air fryer rather than the microwave.