Can Glass Go In An Air Fryer? | The Ultimate Guide

You’ve probably heard the warning: never put glass in an air fryer. Maybe you’ve seen photos of shattered baking dishes or read comments from people who lost a favorite casserole dish that way. The warning sounds absolute — but the truth is more nuanced.

Glass can go in an air fryer safely, but only certain types. The key factors are the glass composition, any existing damage, and how you handle temperature changes. This guide will walk you through which glassware works, which to avoid, and how to use it without turning dinner into a cleanup disaster.

Understanding The Risks: Why Some Glass Shatters

Air fryers work like small convection ovens, circulating hot air at high speed. Temperatures typically reach 350°F–400°F, and the rapid airflow can create uneven heating across a glass dish. If the glass isn’t built to handle that stress, it can crack or shatter.

Two types of glass are generally safe for air fryers: tempered glass and borosilicate glass. Both are engineered to handle heat better than standard soda-lime glass.

Soda-lime glass — the kind used in many cheap bakeware pieces and most drinking glasses — is far more prone to thermal shock. Even a small scratch or temperature swing can cause it to fail. Kitchenware experts consistently recommend staying away from soda-lime glass in any high-heat appliance.

Which Glass Types Are Safe?

People worry because not all glass is created equal. A common misconception is that any “oven-safe” label covers all heat appliances. But the air fryer’s fan-forced heat is different from a still oven. Here’s what to look for:

• Tempered glass: This is glass that’s been heat-treated during manufacturing to make it four to five times stronger than regular glass. Brands like Pyrex (modern) and Anchor Hocking use tempered glass. It handles heat well but is still susceptible to thermal shock if you go from fridge to hot air fryer.
• Borosilicate glass: This older formulation contains boric oxide, which gives it a very low coefficient of thermal expansion. It handles sudden temperature changes much better than tempered soda-lime glass. Vintage Pyrex (pre-1998) is borosilicate; modern Pyrex is tempered soda-lime.
• Oven-safe label: If the bottom of your dish has a clear “oven-safe” symbol (usually a square with a wavy line), it’s likely safe for an air fryer, but double-check with the manufacturer.
• Thin / delicate glass: Any glass that feels lightweight or has thin walls should stay out of the air fryer. It simply isn’t built for high heat.
• Chipped or cracked glass: Even a tiny nick creates a stress point. Heat will exploit that weakness. Discard any glass with visible damage.

When in doubt, stick with metal or silicone pans. Glass is a convenience, not a necessity, for air frying.

How To Safely Use Glass In Your Air Fryer

Even with the right glass, how you use it matters. The single biggest risk is thermal shock — a rapid temperature change that makes the glass expand unevenly. Never place a cold glass dish straight from the fridge into a preheated air fryer. Let it sit on the counter for 15–20 minutes first.

Always check the bottom of the dish for an oven-safe symbol. According to Southern Living’s guide on air fryer glass safety, glassware that is not labeled oven-safe should not be used. That article also warns against using glass not oven-safe even if it looks sturdy.

Another rule: avoid filling the dish with liquid when using it in an air fryer. The rapid air circulation can cause hot liquid to splash, and the combination of liquid + hot glass raises the risk of stress fractures. Stick to dry or lightly oiled foods in glass dishes.

If you’re buying new glass bakeware for your air fryer, look for pieces that are explicitly labeled “air fryer safe” or check the brand’s website. Many manufacturers now test their products in air fryers and publish the results.

Common Mistakes To Avoid

Even experienced cooks make errors when using glass in an air fryer. Here are the most frequent pitfalls:

1. Going from fridge to fryer: A cold glass dish placed into a hot air fryer is the number-one cause of shattering. Always allow the dish to reach room temperature first.
2. Using glass that’s too large: The dish should fit comfortably inside the basket with at least an inch of space around it for air circulation. If it touches the walls, heat can build up unevenly.
3. Preheating with glass inside: Most air fryer recipes call for preheating the empty basket. If you put a glass dish in during preheat, it will experience a rapid temperature spike. It’s safer to add the glass after the preheat is complete.

None of these mistakes guarantee breakage, but they dramatically increase the risk. A little caution goes a long way toward keeping your glass intact — and your dinner on the table.

What The Experts Say

Multiple kitchenware authorities agree that tempered and borosilicate glass are the only types suitable for air fryers. Tasting Table’s safety guide specifically recommends using tempered or borosilicate glass and advises avoiding anything that feels thin or lightweight. That article also points out that vintage Pyrex (borosilicate) holds up better than modern Pyrex (tempered soda-lime) in high-heat situations.

Brand manufacturers like Pyrex UK state that their glass dishes can withstand temperatures from -40°C to +350°C, which covers the typical air fryer range. However, they still recommend against sudden temperature changes. The official guidance is: room-temperature dish into a preheated appliance, not the reverse.

Consumer reports and food sites uniformly warn against using glass that is not explicitly oven-safe. If a dish doesn’t have a stamped symbol or clear instruction, treat it as unsafe. When in doubt, go with metal or silicone — they’re cheaper, lighter, and virtually risk-free.

The Bottom Line

Glass can go in an air fryer, but only when you choose the right type and handle it carefully. Stick with tempered or borosilicate glass that’s labeled oven-safe. Avoid thin, chipped, or cold glass, and never subject it to sudden temperature swings. The reward is a clean, non-reactive dish for roasting veggies or baking small portions.

Check the manual for your specific air fryer model — some brands (like Ninja) have official lists of approved materials. When you find a dish that works, the air fryer becomes a lot more versatile without the worry of shattered glass.