Can You Use Pyrex in an Air Fryer Safely and Effectively

You’re standing in your kitchen, air fryer humming, and you’re ready to cook something delicious—maybe crispy roasted veggies or a gooey chocolate chip cookie. But then it hits you: Can you just pop your trusty Pyrex dish in there without worrying about it cracking, shattering, or ruining your meal? It’s a question I asked myself a few years ago when I first got my air fryer. I love Pyrex for its durability and versatility, but air fryers? They’re like mini convection ovens on steroids. The heat is intense, the airflow is rapid, and the last thing you want is a glass dish exploding mid-cook.

After testing, researching, and even a few kitchen mishaps (yes, I’ve had a Pyrex dish crack—more on that later), I’ve learned a lot about using Pyrex in an air fryer. The short answer? Yes, you can use Pyrex in an air fryer, but with some important caveats. It’s not as simple as tossing any old Pyrex dish in and hitting “start.” There are safety concerns, material differences, and cooking techniques to consider. In this post, I’ll walk you through everything you need to know—from what types of Pyrex work best to how to avoid thermal shock, plus real-world tips to help you cook safely and effectively. Whether you’re a seasoned air fryer pro or just getting started, this guide will help you use your Pyrex dishes with confidence.

Understanding Pyrex: What Makes It Special?

The Science Behind Pyrex Glass

Let’s start with the basics. Pyrex isn’t just any glass—it’s a brand name that’s become synonymous with heat-resistant glassware. Originally made from borosilicate glass, Pyrex was designed to withstand extreme temperature changes. This type of glass has a low coefficient of thermal expansion, meaning it doesn’t expand or contract as much when heated or cooled. That’s why your Pyrex casserole dish can go from the freezer to the oven without cracking.

But here’s a twist: In the 1990s, the U.S. version of Pyrex switched from borosilicate to soda-lime glass, which is treated with a special thermal strengthening process. While it’s still heat-resistant, it’s not quite as resilient to sudden temperature shifts as the original formula. (Fun fact: In Europe, Pyrex still uses borosilicate glass—so if you’re abroad, your Pyrex might handle heat differently.)

Why Thermal Shock Is a Big Deal

Thermal shock happens when one part of a glass object heats up or cools down faster than another. For example, if you take a cold Pyrex dish straight from the fridge and put it into a 400°F air fryer, the outer layer heats up instantly while the inside is still cold. This creates stress in the glass, and—bam—cracks appear.

I learned this the hard way when I tried to make a frozen lasagna in my air fryer. I pulled the Pyrex dish straight from the freezer, set it in the air fryer basket, and turned it on. About 90 seconds later, I heard a loud pop. The dish had cracked diagonally. No shards, thank goodness, but it was unusable. The lesson? Never subject Pyrex to rapid temperature changes. Always bring it to room temperature first.

Pyrex vs. Other Glassware: What’s the Difference?

Not all clear glass dishes are Pyrex. Many people confuse regular glass (like drinking glasses or cheap baking dishes) with Pyrex, but they’re not the same. Regular glass isn’t designed for high heat or thermal stress. Pyrex, even the soda-lime version, is specifically engineered for oven and stovetop use. However, not all Pyrex products are created equal.

For example, Pyrex makes mixing bowls, measuring cups, and storage containers—but not all of them are meant for cooking. Always check the bottom of your dish for oven-safe symbols (usually a square with wavy lines or “Oven Safe” text). If it doesn’t say it’s safe for baking, don’t risk it in your air fryer.

Is Pyrex Safe for Air Fryers? The Truth About Heat and Airflow

How Air Fryers Work (And Why It Matters)

Air fryers use a heating element and a powerful fan to circulate hot air around food. This creates a convection effect, cooking food faster and more evenly than a regular oven—and giving it that crispy, “fried” texture without the oil. But this intense, rapid airflow is a double-edged sword.

The air fryer heats up quickly—often reaching 375°F to 400°F in under 5 minutes. That’s great for food, but tough on glass. Unlike a conventional oven, where heat builds gradually, air fryers blast hot air directly at your dish. This increases the risk of uneven heating and thermal shock, especially if your Pyrex dish is cold or has cold spots (like frozen food).

Can Pyrex Withstand Air Fryer Temperatures?

Yes—but with conditions. Most Pyrex dishes are rated for oven use up to 425°F or 450°F, which is well within the range of most air fryers (which typically max out at 400°F). So temperature-wise, Pyrex should be safe.

But here’s the catch: The real danger isn’t the peak temperature—it’s the rate of temperature change. If your Pyrex dish is at room temperature and you preheat the air fryer first, you’re in good shape. But if you’re adding a cold dish to a hot basket, or putting frozen food in a warm dish, you’re asking for trouble.

For example, I once made a frittata in a Pyrex pie dish. I preheated the air fryer to 375°F, then added the dish (which had been on the counter for 20 minutes). The frittata cooked perfectly, and the dish came out unharmed. But when I tried the same thing with a dish I’d just washed in cold water, it cracked. The moisture and cold temperature created a thermal shock zone.

Airflow and Glass: A Hidden Risk?

Air fryers circulate hot air at high speeds—up to 15–20 mph in some models. This airflow hits the sides and bottom of your Pyrex dish, heating them rapidly. If the food inside is dense or cold (like a frozen casserole), the center of the dish stays cool while the edges heat up. This uneven expansion can cause stress cracks.

To reduce this risk, I recommend:

Preheat the air fryer first. Let it run for 3–5 minutes before adding your Pyrex dish.
Use a trivet or silicone liner. Some air fryer baskets have a raised rack. Placing your Pyrex dish on it helps insulate the bottom from direct heat.
Avoid overcrowding. Make sure hot air can circulate around the sides of the dish for even heating.

Best Pyrex Dishes to Use in an Air Fryer (And Which to Avoid)

Top Pyrex Products for Air Fryer Cooking

Not all Pyrex dishes are ideal for air fryers, but some work beautifully. Here are the types I’ve tested and recommend:

Pyrex Glass Baking Dishes (8×8, 9×13, 9×9): These are perfect for casseroles, brownies, and baked oatmeal. The flat, even bottom helps distribute heat.
Pyrex Pie Plates (9-inch): Great for quiches, frittatas, and fruit crisps. The sloped sides allow airflow, reducing stress on the glass.
Pyrex Mixing Bowls (Oven-Safe Versions): The 2-quart and 3-quart bowls work well for small casseroles or roasting veggies. Just make sure they’re labeled “Oven Safe.”
Pyrex Storage Containers (With Lids): Use these for reheating leftovers. Remove the lid before air frying to avoid melting plastic.

I’ve used my 8×8 Pyrex dish to make everything from mac and cheese to stuffed mushrooms—all with great results. The key is letting the dish warm up first and preheating the air fryer.

Pyrex Dishes to Avoid (Or Use with Caution)

Some Pyrex products aren’t suited for air fryers. Here’s what to avoid or use carefully:

Measuring Cups: These aren’t designed for cooking. The thin walls and handle make them prone to cracking.
Small Ramekins or Custard Cups: These can work, but they heat up too quickly. I once cracked a Pyrex ramekin making mini cheesecakes because the bottom got too hot before the top.
Old or Chipped Pyrex: If your dish has scratches, chips, or hairline cracks, don’t use it. Damage weakens the glass and increases the risk of shattering.
Pyrex Lids (Plastic or Glass): Never air fry with plastic lids on—they’ll melt. Glass lids can be used if labeled oven-safe, but I prefer to cook without lids to allow steam to escape.

Real-World Example: Cooking a Frittata in a Pyrex Pie Plate

Last month, I made a spinach and goat cheese frittata in my 9-inch Pyrex pie plate. Here’s how I did it safely:

Let the pie plate sit on the counter for 20 minutes to reach room temp.
Preheated the air fryer to 375°F for 5 minutes.
Whisked eggs, spinach, cheese, and milk in a bowl.
Poured the mixture into the pie plate and placed it in the preheated air fryer basket.
Cooked for 20 minutes, checking at 15 minutes. The frittata was golden and set, and the dish came out unharmed.

The key? Patience. I didn’t rush the process, and it paid off.

Step-by-Step Guide: How to Use Pyrex in an Air Fryer Safely

Step 1: Check Your Pyrex Dish

Before you start, inspect your Pyrex dish. Look for:

Oven-safe symbol on the bottom
No chips, cracks, or scratches
No discoloration or cloudiness (a sign of old, weakened glass)

If any of these are present, skip it. It’s not worth the risk.

Step 2: Bring the Dish to Room Temperature

This is non-negotiable. Never put a cold Pyrex dish into a hot air fryer. Let it sit on the counter for at least 15–20 minutes. If it was in the fridge, give it 30 minutes. For frozen food, thaw it in the fridge first, or use a different method (like a metal pan).

Step 3: Preheat the Air Fryer

Preheating helps create a stable environment. Set your air fryer to the desired temperature and let it run for 3–5 minutes. This reduces the temperature difference between the air and your dish.

Step 4: Use the Right Size Dish

Your Pyrex dish should fit comfortably in the basket with space on all sides—at least 1 inch. This ensures hot air can circulate and prevents overheating. For example, a 9×9 dish fits in most 5.8-quart air fryers, but it might be too big for a 3.5-quart model.

Step 5: Monitor Cooking Time and Temperature

Air fryers cook faster than ovens. Start checking your food 2–3 minutes before the recipe’s suggested time. Use a meat thermometer or toothpick to test doneness. And if your dish is browning too quickly, lower the temperature by 25°F and extend the time slightly.

Step 6: Cool Gradually

After cooking, don’t place a hot Pyrex dish on a cold countertop or in water. Let it cool in the air fryer basket for 5–10 minutes, then move it to a trivet or heat-safe surface. Avoid sudden temperature drops.

Alternatives to Pyrex: When to Use Something Else

Metal Pans and Dishes

Metal conducts heat faster than glass, so it’s great for air fryers. I use:

Aluminum foil pans: Cheap, disposable, and perfect for casseroles or roasting veggies.
Silicone baking molds: Flexible and non-stick. Great for muffins, egg bites, or mini quiches.
Stainless steel bowls: I use these for reheating leftovers or cooking small portions.

The downside? Metal can react with acidic foods (like tomatoes), and some people don’t like the taste. But for high-heat cooking, it’s often safer than glass.

Silicone and Oven-Safe Ceramic

Silicone is my go-to for sticky foods like brownies or lasagna. It’s flexible, non-stick, and won’t crack from heat. Oven-safe ceramic dishes (like those from Le Creuset or Staub) are also excellent—they heat evenly and can go from air fryer to table.

I’ve used a silicone loaf pan to make banana bread in my air fryer, and it came out perfectly—no sticking, no cracking, and easy to clean.

When to Choose Non-Glass Options

Here’s a quick guide:

Frozen foods: Use metal or silicone. They handle rapid heating better.
High-fat foods (like bacon or sausages): Metal or foil pans prevent grease from pooling.
Small portions or single servings: Silicone molds or ramekins work best.

Common Mistakes and How to Avoid Them

Mistake 1: Using a Cold Dish

This is the #1 cause of Pyrex cracking in air fryers. Always let your dish warm up first. Set a timer if you need to.

Mistake 2: Not Preheating the Air Fryer

Skipping preheat means your dish hits a cold basket, then gets blasted with hot air. Preheat every time.

Mistake 3: Overfilling the Dish

Food should be no more than 1.5 inches deep. Overfilling blocks airflow and causes uneven cooking—and more stress on the glass.

Mistake 4: Using the Wrong Dish Size

A dish that’s too big blocks airflow; one that’s too small can overheat. Match your dish to your air fryer size.

Mistake 5: Cleaning a Hot Dish

Never run a hot Pyrex dish under cold water. Let it cool first. Sudden temperature changes can crack it, even after cooking.

Data Table: Pyrex Dish Performance in Air Fryers

Pyrex Dish Type	Max Temp (°F)	Air Fryer Safe?	Best For	Tips
8×8 Baking Dish	425	Yes (with preheat)	Casseroles, brownies, baked oatmeal	Let warm to room temp; preheat air fryer
9-inch Pie Plate	450	Yes	Frittatas, quiches, crisps	Use for even, shallow dishes
2-Quart Mixing Bowl	425	Yes (if oven-safe)	Small casseroles, roasted veggies	Check label; avoid thin-walled versions
Measuring Cup	Not rated	No	Never use	Not designed for cooking
Storage Container (Glass)	425	Yes	Reheating leftovers	Remove plastic lid first

So, can you use Pyrex in an air fryer? Absolutely—but do it wisely. Pyrex is a fantastic tool for air frying when used correctly. It’s perfect for baking casseroles, roasting veggies, or making frittatas. But it’s not invincible. Thermal shock, rapid temperature changes, and improper use can lead to cracks or worse.

The key is respect. Respect the glass. Warm it up, preheat your air fryer, and avoid sudden changes. And when in doubt, use a metal or silicone alternative. I’ve had great success with both—and I’ve learned that sometimes, the best tool for the job isn’t the one you’ve used for years, but the one that fits the task.

Now go make that casserole. Just let your Pyrex warm up first. Your kitchen (and your meal) will thank you.

Frequently Asked Questions

Can you put Pyrex in an air fryer without it cracking?

Yes, you can use Pyrex in an air fryer safely, but avoid sudden temperature changes (like placing cold Pyrex into a preheated fryer) to prevent cracking. Always let it come to room temperature first.

Is Pyrex oven-safe for air fryer cooking?

Pyrex is designed for oven use, and since air fryers operate similarly to convection ovens, it’s generally safe to use in air fryers. Ensure the Pyrex dish fits securely without touching the heating element.

What type of Pyrex can you use in an air fryer?

Use borosilicate or tempered Pyrex glass dishes that are oven-safe and fit within your air fryer basket. Avoid cracked or damaged dishes to ensure safety during high-heat cooking.

Can you use Pyrex in an air fryer for baking or reheating?

Absolutely! Pyrex is ideal for baking casseroles, reheating leftovers, or cooking small dishes in an air fryer. Just preheat the air fryer first to minimize thermal shock.

Does using Pyrex in an air fryer affect cooking time?

Pyrex may slightly increase cooking time compared to metal pans because glass retains heat differently. Check food 5–10 minutes earlier than the recipe suggests to avoid overcooking.

Are there any risks to using Pyrex in an air fryer?

The main risk is thermal shock, which can cause breakage. Always avoid extreme temperature shifts, and never place a hot Pyrex dish on a cold surface immediately after cooking.

Key Takeaways

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