Can Glass Go in the Air Fryer Find Out Here

No, you should never put glass in an air fryer unless it’s explicitly labeled as air fryer-safe or made from borosilicate or tempered glass designed for high, rapid temperature changes. Most standard glassware can crack or shatter due to the intense heat and airflow, creating a serious safety hazard—always check manufacturer guidelines before attempting.

Key Takeaways

• Never place glass in air fryers: Extreme heat can cause cracking or explosions.
• Use oven-safe glass only: Tempered glass like Pyrex may withstand lower air fryer temps.
• Check manufacturer guidelines: Confirm if your air fryer permits any glassware usage.
• Preheat glass gradually: Avoid sudden temperature changes to prevent breakage.
• Opt for metal or silicone: Safer, heat-friendly alternatives for air fryer cooking.
• Monitor closely if using glass: Stop immediately if you notice stress or damage.

Can Glass Go in the Air Fryer? Find Out Here

Air fryers have revolutionized the way we cook, offering a healthier alternative to traditional deep frying while still delivering that coveted crispy texture. These compact kitchen appliances use rapid air circulation to cook food evenly and efficiently, making them a staple in modern households. But as their popularity grows, so do the questions about what materials are safe to use inside them. One common query that pops up in cooking forums and kitchen chats is: can glass go in the air fryer? Whether you’re reheating leftovers in a glass container, baking a dessert in a glass dish, or trying to avoid plastic, it’s essential to understand the compatibility of glass with air fryer cooking.

The answer isn’t a simple yes or no—it depends on several factors, including the type of glass, the temperature settings, and how the glass is used. While glass is generally heat-resistant, not all glass is created equal, and the intense, direct heat of an air fryer presents unique challenges. In this comprehensive guide, we’ll explore the science behind glass and heat, evaluate which types of glass are air fryer-safe, and provide practical tips to help you cook safely and effectively. By the end, you’ll know exactly when and how to use glass in your air fryer—and when it’s best to reach for another material. Whether you’re a seasoned air fryer pro or just starting out, this article will equip you with the knowledge to make informed decisions and avoid kitchen mishaps.

Understanding How Air Fryers Work

The Science Behind Rapid Air Circulation

Air fryers operate on the principle of convection cooking. Unlike conventional ovens that rely on radiant heat from heating elements above or below, air fryers use a powerful fan to circulate hot air rapidly around the food. This creates a crisp, browned exterior while cooking the interior evenly—mimicking the texture of deep-fried foods with little to no oil. The heating element typically reaches temperatures between 175°F (80°C) and 400°F (205°C), depending on the model and setting. The fan ensures that hot air hits the food from all angles, which is great for achieving even browning but can be problematic for heat-sensitive materials like certain types of glass.

The key difference between an air fryer and a traditional oven is the speed and intensity of airflow. While ovens heat slowly and distribute warmth more gradually, air fryers deliver heat quickly and directly. This rapid temperature rise can cause thermal shock in materials that aren’t designed to handle sudden temperature changes. Glass, in particular, is vulnerable to thermal stress if it’s not tempered or borosilicate-based. Understanding this mechanism is crucial when determining whether glass containers can safely withstand air fryer conditions.

Air Fryer vs. Oven: Why It Matters for Glass

Many people assume that if a glass dish is oven-safe, it’s automatically air fryer-safe. However, this isn’t always the case. Ovens typically heat from the sides and top, with a more gradual temperature increase. Air fryers, on the other hand, blast hot air directly at the glass from multiple directions, which can create uneven heating and stress points. For example, a glass casserole dish that survives an hour in a 350°F oven might crack in a 15-minute air fryer session at the same temperature due to the intense convection.

Additionally, air fryers often have smaller cooking chambers, meaning glass dishes are closer to the heating element and fan. This proximity increases the risk of localized overheating. Some air fryer models also have heating elements that cycle on and off rapidly, creating temperature fluctuations that can weaken glass over time. Therefore, even if a glass dish is labeled “oven-safe,” it’s important to verify whether it’s also rated for rapid thermal cycling—a common feature in air fryers.

Types of Glass and Their Heat Resistance

Regular Glass: Not Recommended

Regular glass, such as that used in drinking glasses, mason jars (non-tempered), and some storage containers, is made from soda-lime silica. While it’s fine for cold or room-temperature use, it has poor thermal shock resistance. When exposed to sudden temperature changes—like being placed directly into a preheated air fryer—regular glass can develop micro-cracks or shatter completely. This is due to the uneven expansion of the glass material when one part heats faster than another.

For example, placing a cold mason jar filled with soup into a 375°F air fryer can cause the bottom to expand rapidly while the top remains cool, creating internal stress that leads to cracking. Even if the jar doesn’t break immediately, repeated exposure to such conditions can weaken its structure, making it unsafe for future use. Bottom line: Avoid using regular glass in air fryers.

Tempered Glass: A Safer Option (With Caution)

Tempered glass, also known as safety glass, is treated with heat and chemicals to increase its strength and thermal resistance. It’s about four to five times stronger than regular glass and can typically withstand temperatures up to 400°F (205°C)—well within the range of most air fryers. Many glass baking dishes, such as Pyrex (in its tempered form), are made from this material. However, even tempered glass has limitations in air fryers.

The main concern is thermal shock. Tempered glass is designed to handle gradual temperature changes, but the rapid airflow and direct heating in air fryers can still cause stress. For instance, placing a cold tempered glass dish directly into a preheated air fryer increases the risk of cracking. Always let the dish warm up slowly—either by preheating it with the air fryer or bringing it to room temperature first. Additionally, avoid stacking or overcrowding, which can block airflow and create hot spots.

Borosilicate Glass: The Gold Standard

Borosilicate glass, used in high-quality cookware like Pyrex (original formula), Duralex, and laboratory glassware, contains boron trioxide. This additive significantly increases thermal shock resistance, allowing the glass to withstand temperatures from -40°F to over 450°F (-40°C to 230°C). It can handle rapid temperature changes far better than tempered glass, making it the best choice for air fryer use.

For example, a borosilicate glass casserole dish can be taken from the refrigerator and placed directly into a preheated air fryer without cracking—something that would likely break a regular or tempered glass dish. Brands like CorningWare (original) and certain Pyrex lines use borosilicate, though it’s important to check the manufacturer’s specifications. Look for labels like “borosilicate,” “thermal shock resistant,” or “microwave and oven safe.” These dishes are ideal for baking casseroles, reheating leftovers, or even making desserts like bread pudding in the air fryer.

Safe Practices for Using Glass in Air Fryers

Preheat the Air Fryer (and the Glass)

One of the most effective ways to prevent glass from cracking in an air fryer is to avoid thermal shock. Always preheat the air fryer for 3–5 minutes before adding your glass dish. This ensures the chamber is at a stable temperature and reduces the sudden temperature difference. For even better results, let the glass container sit at room temperature for 10–15 minutes before placing it in the air fryer. If you’re using a dish straight from the fridge, consider warming it under lukewarm tap water for a minute or two to bring it closer to room temperature.

For example, if you’re reheating lasagna in a borosilicate glass dish, preheat the air fryer to 350°F. While it heats, let the dish sit on the counter. Once the air fryer beeps, place the dish inside and cook for 10–12 minutes. This gradual transition minimizes stress on the glass and ensures even heating.

Use the Right Size and Shape

Not all glass dishes are created equal in terms of fit and airflow. Choose a dish that allows at least 1 inch of clearance on all sides from the heating element and fan. This prevents direct exposure to intense heat and ensures hot air circulates evenly. A dish that’s too large can block airflow, leading to uneven cooking and hot spots that stress the glass. Conversely, a dish that’s too small may overheat or tip over.

For best results, use shallow, wide dishes rather than deep ones. A 7×11-inch glass baking dish is ideal for most air fryer models. Avoid tall containers like mugs or deep bowls unless they’re specifically designed for convection cooking. Also, ensure the dish has a flat bottom so it sits securely on the air fryer basket or rack.

Avoid Sudden Temperature Changes

Never place a hot glass dish directly on a cold surface (like a granite countertop) or into cold water after cooking. The rapid cooling can cause thermal shock and cracking. Instead, let the dish cool gradually on a wire rack or trivet. Similarly, don’t transfer a cold dish from the freezer or fridge directly into a hot air fryer.

Tip: If you’re cooking a dish that requires multiple temperature changes (e.g., baking then broiling), consider using the air fryer’s dual-zone feature (if available) or adjust settings gradually. For example, start at 300°F, then increase to 375°F after 5 minutes to avoid shocking the glass.

What You Can Cook in Glass in an Air Fryer

Baked Goods and Desserts

Glass is excellent for baking in air fryers. Its even heat distribution helps cakes, brownies, and breads rise uniformly. Try making mini chocolate lava cakes in individual borosilicate ramekins. Preheat the air fryer to 325°F, place the ramekins in a shallow glass dish to catch drips, and cook for 12–15 minutes. The result? A moist, gooey center with a slightly crisp top.

For a healthier option, bake oatmeal cups in glass muffin molds. Combine rolled oats, banana, egg, and cinnamon, pour into molds, and air fry at 350°F for 10 minutes. The glass ensures even cooking without sticking.

Reheating and Cooking Leftovers

Reheating leftovers in glass is a game-changer. Place a glass container with lasagna, casserole, or stir-fry into a preheated air fryer at 325–350°F for 8–10 minutes. The glass retains moisture while the air fryer crisps the top layer. For example, a glass dish of mac and cheese will come out creamy inside with a golden, bubbly top—no soggy microwave texture.

Pro tip: Add a splash of broth or water to the dish before reheating to prevent drying. Cover with foil for the first half of cooking, then remove it to crisp the top.

Marinating and Cooking Proteins

Use glass containers to marinate chicken, fish, or tofu, then transfer them directly to the air fryer (if the container is safe). Marinate chicken thighs in a glass dish with soy sauce, garlic, and ginger for 30 minutes. Place the dish in a preheated air fryer at 375°F and cook for 18–20 minutes, flipping halfway. The glass won’t absorb odors or leach chemicals, unlike plastic.

For fish, use a glass baking dish to cook salmon fillets with lemon slices and herbs. The even heat ensures a flaky, moist texture without overcooking.

Common Mistakes and How to Avoid Them

Using Non-Heat-Resistant Glass

One of the biggest mistakes is assuming all glass is safe. Drinking glasses, mason jars (unless labeled as tempered), and decorative glassware are not designed for cooking. Even some “oven-safe” glass dishes may not withstand air fryer conditions. Always check the manufacturer’s guidelines. Look for labels like “air fryer safe,” “convection safe,” or “thermal shock resistant.” When in doubt, opt for borosilicate glass.

Overcrowding or Stacking

Stacking multiple glass dishes or overcrowding the air fryer basket blocks airflow and creates hot spots. This can cause uneven cooking and increase the risk of glass cracking. If you need to cook multiple items, use a multi-tier rack designed for air fryers or cook in batches. For example, bake cookies on a single glass tray instead of stacking two.

Ignoring Manufacturer Warnings

Some glass cookware brands explicitly state that their products are not for use in air fryers or convection ovens. For instance, newer Pyrex lines (post-1998) often use tempered soda-lime glass, which is less resistant to thermal shock than borosilicate. Always read the fine print on packaging or the manufacturer’s website. If a brand warns against convection cooking, it’s best to follow that advice.

Table: Glass Types and Air Fryer Compatibility

Glass Type	Max Temp	Thermal Shock Resistance	Air Fryer Safe?	Examples
Regular Soda-Lime	250°F (120°C)	Low	❌ No	Drinking glasses, non-tempered jars
Tempered Glass	400°F (205°C)	Medium (with caution)	⚠️ Yes, if preheated & gradual	Most Pyrex (post-1998), Anchor Hocking
Borosilicate Glass	450°F+ (230°C+)	High	✅ Yes	Original Pyrex, Duralex, laboratory glass

Conclusion: When and How to Use Glass Safely

So, can glass go in the air fryer? The answer is a cautious yes—but only if you use the right type of glass and follow safe practices. Borosilicate glass is the safest choice, capable of withstanding the rapid heating and airflow of air fryers without cracking. Tempered glass can work, but requires careful preheating and gradual temperature transitions. Regular glass, however, should never be used in an air fryer due to its high risk of shattering.

By understanding how air fryers work, selecting the appropriate glassware, and adopting smart cooking habits—like preheating, avoiding thermal shock, and choosing the right dish size—you can safely use glass to expand your air fryer’s capabilities. From baking desserts and reheating leftovers to marinating proteins, glass opens up a world of culinary possibilities without compromising safety.

Remember, not all “oven-safe” glass is air fryer-safe. Always check labels, prioritize borosilicate or clearly labeled convection-safe glass, and never rush the process. With these guidelines, your air fryer can become a versatile, all-in-one kitchen tool—capable of everything from crispy fries to delicate soufflés, all while keeping your food free from harmful chemicals often found in plastic. So go ahead, experiment with glass in your air fryer, and enjoy delicious, healthy meals with confidence.

Frequently Asked Questions

Can glass go in the air fryer without cracking?

Yes, but only if it’s labeled as oven-safe or air fryer-safe. Regular glass may crack due to rapid temperature changes, so always check the manufacturer’s guidelines.

What type of glass is safe to use in an air fryer?

Borosilicate glass (e.g., Pyrex) or tempered glass designed for high heat is safe for air fryers. Avoid thin or decorative glass that isn’t rated for oven or air fryer use.

Can I put a glass bowl in the air fryer basket?

Yes, as long as the bowl is oven-safe and fits without touching the heating element. Ensure there’s space for air circulation to prevent uneven cooking or breakage.

Is it safe to preheat glass in the air fryer?

Preheating glass in the air fryer can cause thermal shock. Instead, place the glass container in the air fryer when it’s cold and let it warm gradually with the machine.

Can glass go in the air fryer for reheating food?

Absolutely, but use oven-safe glass and avoid drastic temperature shifts. Let the glass reach room temperature before placing it in the air fryer to minimize breakage risks.

Why does glass sometimes break in air fryers?

Glass breaks due to thermal shock—sudden temperature changes. Always use heat-resistant glass and avoid placing cold glass into a preheated air fryer or vice versa.