Can You Bake With Pyrex? Oven Temperature & Safety Guide

Quick Summary: Yes, you can bake with Pyrex. Branded Pyrex glass is oven-safe up to 425°F (218°C); use it in a fully preheated oven and avoid thermal shock by never moving the dish straight from the fridge or freezer to a hot oven. Keep it off the stovetop and out of the broiler.

Read on to discover the difference between new and old Pyrex, if Pyrex lids are oven-safe, and how to bake in a Pyrex bowl.

Bread in a Pyrex dish with text overlay: Can you bake with Pyrex.

Your kitchen can be busy and cluttered, but with the right baking tools, it doesn't have to be. Instead, you can declutter the kitchen and toss what you don't need.

In general, you can keep a few baking dishes and use them confidently, knowing how to use them safely.

For a classic look, bake your favorite French Brioche Toast Casserole in an oven-safe ceramic or glass dish. Or use metal bakeware and adjust the oven temperature and baking time for the best results.

For added convenience, invest in a high-quality borosilicate Pyrex pan that can be used in ovens and microwaves, in your refrigerator, or in your freezer.

What is Pyrex glass?

Pyrex glass is a branded glassware with a long history dating back to 1915. Pyrex is made of glass, so don't confuse the Pyrex brand with a non-existent Pyrex material.

Once again, when we talk about Pyrex dishes, we mean the iconic kitchen glassware made by the Pyrex brand.

Old Pyrex vs new Pyrex

Is there such a thing as old Pyrex and new Pyrex? If yes, what is the difference?

Initially, Pyrex pieces were manufactured by Corning, which used borosilicate glass resistant to sudden temperature changes (thermal shock).

Borosilicate glass is made by mixing silica sand with boron trioxide, which provides high durability.

In 1998, when Corning sold its brand to World Kitchen, borosilicate Pyrex was replaced with a cheaper alternative: heat-strengthened soda-lime glass.

Tempered soda-lime glass is heat- or chemically tempered and is made of silica sand, sodium oxide, and calcium oxide. It withstands high temperatures, but it doesn't quite match borosilicate glass.

However, tempered glass has higher mechanical strength when dropped than borosilicate.

So old Pyrex is borosilicate glassware produced before 1998. You can probably find it in your grandmother's and mother's cabinets. New Pyrex is tempered glassware with the pyrex® logo made today.

Is there a Pyrex® (PYREX®) brand that still produces borosilicate Pyrex products?

In 1922, in France, glassblowers Clovis and Léon Régent produced the first borosilicate balloons. They became pioneers of the Le Pyrex brand in France.

The European PYREX® brand still manufactures its products from borosilicate glass.

Is Pyrex oven safe?

Is Pyrex safe in the oven? Nowadays, both Pyrex brands label their glass products as oven-safe, ensuring cooking glassware is safe in the oven. So the answer to the question "Is all Pyrex oven safe?" is yes.

Pyrex glass products are oven-safe up to at least 500°F (260°C), but it's safer to stay below 425°F (218°C).

Despite the experimental cases of baking a pizza on a Pyrex glass in the oven at 600°F (315°C) or over the open flame on a stovetop, avoid these extreme conditions.

With oven-safe Pyrex, be careful with rapid temperature changes to avoid shattering.

These include situations like moving cold Pyrex to the oven, pouring cold water into hot glassware, or exposing Pyrex to temperature changes while preheating the oven.

Pyrex isn't considered oven-safe for use in a toaster oven, under the broiler, or on the grill.

What temperature can Pyrex withstand?

For everyday baking, treat 425°F (218°C) as the safe upper limit for Pyrex glass. Both major Pyrex brands label their bakeware oven safe at any temperature a normal recipe calls for, and most home recipes stay well below that mark.

Borosilicate Pyrex (the type sold in Europe as PYREX) tolerates more heat, and lab figures put its limit far higher, but pushing past 425°F (218°C) in a home oven raises the risk of the glass shattering. So a Pyrex dish is fine in a 350°F (177°C) or 400°F (204°C) oven, and you can go up to 425°F (218°C) with care.

What Pyrex cannot handle is direct or uneven heat. Keep it off the stovetop, out of the broiler, and away from a toaster oven or grill, where one spot heats much faster than the rest and can crack the glass.

Can Pyrex go in the oven?

Pyrex dishes with the pyrex® or PYREX® logos on the bottom are oven-safe and can be safely used for cooking, baking, and reheating food in the oven.

While both borosilicate PYREX® and tempered glass Pyrex resist high heat and thermal shock, they aren't equal. Borosilicate is superior between the two.

When handling different Pyrex glass products, you must know what material they're made from. For example, borosilicate PYREX® is more heat resistant and can withstand a temperature change of up to 396°F (220°C).

Tempered-glass Pyrex is more susceptible to thermal shock, so you may want to invest in borosilicate glass cookware.

Still, with appropriate use and by following the manufacturer's instructions, baking with Pyrex is the safest and most enjoyable experience.

Are Pyrex lids oven-safe?

Pyrex glass lids that come with casserole dishes are oven-safe and can be used up to 425°F (218°C). However, all safety precautions for Pyrex glassware also apply to Pyrex glass lids (see below).

You can use them in a preheated oven, allowing you to check the food without disturbing the cooking process or the temperature.

Moreover, covering the Pyrex casserole dish will cook food faster. This is because it traps heat inside the dish instead of letting it dissipate into the oven. This even makes your food moister. Alternatively, you can cover your dish with aluminum foil.

Pyrex plastic lids are BPA-free and designed for storing purposes. Unfortunately, they aren't oven-safe, but microwave-safe. Check the product manual for more information.

Is vintage Pyrex safe?

Vintage Pyrex inherited from your Grandma may be one of the most treasured dishes in your kitchen. But is it safe to use in the oven?

You can cook your favorite recipes in vintage Pyrex without problems as long as the oven temperature doesn't exceed 425°F (218°C).

But with age, vintage Pyrex dishes may crack or chip, making them unsuitable for everyday use. Also, avoid microwaving them or using them in everyday life. Keep these Pyrex ware for decoration only.

Baking in Pyrex

Can you bake in Pyrex? Of course you can. But you might have another question:

Pyrex glassware is made of glass, so using glass products for baking can cause the sides and bottom of your bakes to brown quickly.

To avoid this issue and achieve even baking in a Pyrex glass bowl, decrease the oven temperature by 25°F (about 15°C) below what your recipe suggests.

The baking time will likely be 5-10 minutes less than recommended. For the best results, check your cake's doneness with a toothpick or cake tester 10 minutes earlier than the suggested time.

Can Pyrex go from fridge to oven?

The short answer is no, but it is debatable. Let's try to find the answer.

When transferring Pyrex from a cold environment such as a fridge or freezer, the glassware is exposed to instant temperature change.

"Stress produced in a body or a material as a result of a sudden temperature change" is called thermal shock.

With Pyrex glassware, the radiant heat initiates thermal stress. Different parts of the glass expand and contract by different amounts. This changes the glass structure, and the glass shatters.

Clear Pyrex bowls are heat-resistant and withstand thermal shock, but not when you bring a frozen Pyrex dish into a hot oven.

Despite the European PYREX claims that

You can use a borosilicate glass dish and take it from the freezer (or refrigerator) to the oven or the microwave with no problem,

it is better to play on the safe side. Treat any Pyrex glass dish like any other piece of glass.

Does Pyrex break?

Pyrex is known for its strength, durability, and heat resistance; however, under certain conditions, it can break.

Uneven heating, direct contact with heating elements, and exposure to thermal shock are just a few factors that can trigger Pyrex breakage. Avoid accidentally dropping the glass product.

Consumer Reports tested Pyrex, made of borosilicate and tempered glass. They found that taking soda-lime Pyrex out of a hot oven and putting it on a wet granite countertop caused it to shatter instantly.

At the same time, they tested borosilicate Pyrex, which didn't shatter under such extreme temperature changes.

While tempered soda-lime glass is more sensitive to thermal changes, it is more stable when dropped than borosilicate glass. Therefore, it is also quite essential to consider buying Pyrex glassware.

Tips for using Pyrex

How to avoid breaking Pyrex glass? Pyrex is a trusted brand of glass bakeware, but it comes with risks if not used correctly.

To keep Pyrex safe in your kitchen, follow its safety tips.

Use only branded Pyrex glass in the oven; it must bear the Pyrex logo.
Check the Pyrex dish for chips and cracks. Old glass bakeware also risks shattering in the oven.
Always preheat the oven before putting Pyrex in.
Don't exceed 425°F (218°C).
Never heat an empty Pyrex in the oven.
With frozen food or wet ingredients that release liquid, add a little liquid to the bottom of the bowl. It helps avoid even minimal thermal shock between frozen food and a hot oven.
When handling hot Pyrex dishes, use both hands and dry potholders or oven mitts.

But the most important thing is to avoid situations that create a thermal shock. Here are four simple rules:

Don't move Pyrex from the fridge or freezer to the oven and vice versa. Instead, let your dish come to room temperature first.
Don't pour cold water into a hot Pyrex dish. Instead, let your pan cool down to room temperature before introducing it to water.
Don't place cold dishes directly on a wet, cold, or cool surface, such as a countertop or metal. Instead, put hot Pyrex on a dry cloth, dish towel, trivet, or cooling rack.
Don't use Pyrex on a stovetop over an open flame, on an electric burner, in a toaster oven, under the broiler, or on the grill.

Related guides

Conclusion

Can Pyrex glass go in the oven? The short answer is yes. Kitchen safety starts with thoroughly understanding both oven-safe and microwave-safe Pyrex glassware.

This comprehensive safety guide, paired with an article devoted to microwaving Pyrex, will ensure you know everything about cooking with Pyrex.

Stock up your kitchen with the safest PYREX products made of borosilicate glass. Discover the impressive range of Pyrex dishes, from measuring cups to Pyrex ovenware bowls, Pyrex cooking pots, and Pyrex glass trays.

Check the Pyrex online shop, Amazon.com, and Amazon.fr, which deliver products to the United States. Here are a few of my favorites to consider:

Pyrex glass baking dish
Pyrex oven dish
Pyrex glass measuring jug
Pyrex glass pie plate
Pyrex storage containers

A great alternative to expensive European Pyrex is cheaper brands that manufacture borosilicate glass cookware:

To go further, find tutorials about whether the glass is microwave-safe and whether you can microwave Pyrex.

FAQ

Is glass Pyrex oven safe?
Pyrex glass with the branded Pyrex logo is oven safe and can be used to cook, bake, and reheat food in the oven.

Are Pyrex bowls oven safe?
Pyrex bowls with the signature Pyrex logo are oven safe and can be used to cook, bake, and reheat food in the oven.

Can Pyrex go on the stove?
Pyrex dishes don't tolerate direct heat, so you can't use them on the stove over an open flame or an electric burner.

How hot can you heat Pyrex?
Branded Pyrex glass can be safely used in the oven at 425°F (218°C). Borosilicate Pyrex can be heated higher, up to 500°F (260°C) according to some sources, but there is no need to push it that far in a home kitchen.

Pyrex is oven safe to what temperature?
Pyrex is oven-safe up to 425°F (218°C). Even though experiments show the glass can sometimes withstand up to 500°F (260°C), it is best not to exceed the safe limit.

Can you bake Pyrex at 450°F (232°C)?
You can bake European PYREX cookware at 450°F (232°C), but the risk of the glass shattering rises as you climb toward 500°F (260°C).

Can a cold Pyrex dish go in the oven?
A cold Pyrex dish should not go straight into a hot oven, because the rapid temperature change can cause the glass to shatter. Let it come closer to room temperature first.

Can I put a frozen Pyrex dish in the oven?
You cannot put a frozen Pyrex dish in a hot oven, since the sudden temperature change creates thermal shock that can crack or shatter the glass.