It depends on the Pyrex.
You bought a Pyrex dish specifically for casseroles and roasted vegetables. It has survived countless ovens and microwaves without issue. So when the air fryer recipe calls for a baking dish that fits the basket, the Pyrex feels like the obvious choice. It looks thick. It feels sturdy. What could possibly go wrong?
The honest answer is complicated, because the official Pyrex brand gives two different answers depending on where you live. In the United States, the manufacturer explicitly warns against using Pyrex in an air fryer, citing the risk of shattering from the direct, concentrated heat source. In Europe, the same brand markets its dishes as ideal for air fryers. Understanding why comes down to the glass itself.
Why The Answer Depends On Your Kitchen
Modern Pyrex sold in the United States is made from soda-lime glass. This type of glass is durable, scratch-resistant, and cheap to produce, but it handles rapid temperature swings poorly. Vintage Pyrex, and many contemporary Pyrex dishes sold in Europe, are made from borosilicate glass. Borosilicate handles thermal shock much better.
An air fryer is not an oven. It uses a small, intense heating element with a powerful fan that blasts direct heat onto the food and the dish. A borosilicate dish can handle this thermal assault. A soda-lime dish, which the official Pyrex Home FAQ confirms cannot be used in an air fryer, is vulnerable to sudden temperature changes that can lead to shattering.
Why The Confusion Keeps Growing
Most people assume all glass baking dishes are the same. The marketing doesn’t help. Pyrex is a trusted brand name, so few people check the fine print on the bottom of the dish or the manufacturer’s website.
- Trusted Brand Legacy: Pyrex has been around for decades. Families pass down dishes without knowing the glass formulation changed. Vintage borosilicate dishes look and feel identical to modern soda-lime ones.
- Mixed Manufacturer Guidance: The official Pyrex US FAQ says no. The official Pyrex EU blog says yes. A regular consumer has no reason to check both sites for contradictory information.
- “Oven Safe” Confusion: Many people assume “oven safe” automatically means “air fryer safe.” While the temperature limits overlap, the heating mechanism is different enough to matter.
- Lack of Obvious Markings: It is not always easy to tell if a dish is soda-lime or borosilicate. Unless you remember buying it or check for small markings on the bottom, it is a guessing game.
- Success Stories vs. Shatter Photos: Online communities are split. People post perfectly cooked meals alongside photos of shattered glass baskets, making it hard to know what is truly safe.
The confusion will not completely resolve until Pyrex aligns its global marketing or clearly labels which glass type is in the box. Until then, users have to do their own homework.
Identifying Safe Pyrex For Your Air Fryer
If you own Pyrex dishes, figuring out which ones are safe starts with checking the bottom of the dish. Look for markings that say “tempered glass,” “oven safe,” or a specific temperature rating. Modern US Pyrex usually has a logo with the Pyrex name in all caps inside an oval.
| Glass Type | Typical Pyrex Market | Thermal Shock Resistance | Air Fryer Recommendation |
|---|---|---|---|
| Soda-Lime | Modern US / Corelle Brands | Low | Not recommended by manufacturer |
| Borosilicate | Vintage US (pre-1990s) / Modern EU | High | Generally considered safe with care |
| Tempered Soda-Lime | Modern US “Oven Safe” | Moderate | Proceed with caution; check manufacturer |
| Thick Tempered Glass | Various brands | Moderate-High | Often used, but risk is not zero |
| Ceramic Bakeware | Various brands | High | Generally safe and preferred by many |
Pyrex EU explicitly states their glass dishes are ideal for air fryers and can withstand extreme temperatures. The Co recommends checking the Pyrex EU air fryer safe guideline if you have European glassware.
For everyone else, the safest approach is to assume modern US Pyrex is off-limits. If you must use glass, choose a thick, tempered glass dish from another brand that has a proven track record in your oven.
How To Air Fry Safely With Glass Bakeware
If you decide to use glass in your air fryer despite the warnings, or if you have confirmed you have a heat-resistant dish, following strict safety protocols minimizes the risk of thermal shock.
- Preheat the glass dish: Never put a cold glass dish into a hot air fryer. Let it sit in the basket as the appliance preheats to come up to temperature together.
- Avoid drastic temperature changes: Pull the basket out gently. Place hot glass dishes on a wire rack or a dry towel, never on a cold countertop or a wet surface.
- Use a protective layer: A thin silicone mat at the bottom of the air fryer basket can cushion the glass and provide a small amount of insulation from the direct heating element.
- Stick to lower temperatures: Keep the air fryer below 375°F when using glass. Most soda-lime glass struggles with the direct high heat of 400°F or more.
- Check the fit: Ensure the glass dish does not touch the heating element at the top of the air fryer. Leave at least an inch of space for air circulation.
Following these steps does not eliminate the risk, but it gives the glass a better chance. If you see any chips or cracks in your glassware, retire it immediately.
Regional Differences And Manufacturer Stance
The confusion around pyrex air fryer suitability is almost entirely driven by the brand’s split manufacturing. Corelle Brands, which owns Pyrex in the US, manufactures its glassware from soda-lime glass and explicitly states it is not suitable for air fryers because the direct heat source could cause breakage.
In Europe and the UK, Pyrex glassware is still manufactured using a different formulation that handles thermal shock much better. Per the Pyrex EU blog, their dishes are ideal for air fryers and designed for the demands of the appliance.
| Region | Official Stance | Glass Used |
|---|---|---|
| United States | Not suitable (risk of breakage) | Soda-lime |
| United Kingdom / Europe | Recommended / Ideal for use | Borosilicate / High-resistance glass |
| Australia / New Zealand | Generally accepted as safe if oven-safe | Varies (check bottom marking) |
If you are outside the US, you have a much higher chance of owning Pyrex that is safe for the air fryer. You can verify this by checking the bottom of your dish for a European safety mark or reading the Pyrex EU ideal for air discussion to compare your dish.
The Bottom Line
The safest answer is to avoid using modern US Pyrex in an air fryer. If you have European Pyrex or a vintage set, it is generally considered acceptable, but you should always preheat the dish with the basket and avoid sudden temperature changes.
When cooking air fryer baked potatoes in a ramekin, stick to thick ceramic or metal ramekins explicitly rated for air frying unless you are 100% certain of your Pyrex’s glass type and origin.
References & Sources
- Co. “Which Dish Should You Use in Your Air Fryer” Pyrex EU states that their glass dishes are ideal for use in air fryers and can withstand extreme temperatures.
- Pyrex. “Which Dish to Use in Your Air Fryer” Pyrex dishes are ideal for use in air fryers, and glass and metal dishes with non-stick coating are recommended for baking in an air fryer.