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Can You Put Cold Glass in the Oven? (Read This First!)

Who doesn’t like to use glass cookware for cooking or reheating food in the oven, right? It is the most convenient option as we mostly use glass containers in our homes.

You might be wondering if it is safe to put cold glass in the oven and the way to prevent it from breaking. Let’s clarify your queries one by one.

Can you put cold glass in the oven?

Glass dishes can’t withstand severe temperature changes too well. They can break or shatter if the temperature suddenly changes. So, putting cold glass directly in the oven is not recommended at all. It will be safest to put the glass in the oven at room temperature rather than cold.

Putting the cold glass cookware’s are a mystery to many as it has different temperature withstand limits. Let’s dig in deep to know more.

Can you put cold glass pyrex in the oven?

You can use a glass pyrex cookware to refrigerate, reheat, and cook the food as they are both freezer-safe, microwave-safe, and oven-safe.

According to the Pyrex website, you can directly put a cold glass pyrex dish from the refrigerator to an oven as they don’t expand too much.

However, just like every glass cookware, it is not recommended to expose the pyrex dish to high temperature changes frequently. It is better to put cold pyrex in a cold oven than preheated one for a safe cooking or reheating experience.

Can you put a cold glass pie plate in the oven?

You should not put a cold glass pie plate straight from the freezer to the oven. Glass pie plates are manufactured for refrigerating and cooking.

Still, they are not made to withstand quick temperature changes. So, you should defrost the cold pie plate before putting it in the oven.

Is it ok to put cold glass in the oven?

Glass is one of the most fragile materials. The glass bowls and plates might shatter if they are taken from low temperature and placed in a high-temperature place, and vice versa. So, you should avoid putting cold glass in the oven directly.

Will cold glass break in the oven?

Cold glass can break in the oven because of thermal shock caused by the drastic temperature change. When you put cold glass in the oven, it goes from low temperature to very high temperature in a very short time, which causes the glass to expand.

While expansion, stress develops in the glass, resulting in shattering or cracking.

What happens if you put cold glass in the oven?

When you put cold glass in the oven, it will go from quite a low temperature to an very high temperature in a matter of minutes. As a result of the sudden temperature change, the glass cookware might experience thermal shock, resulting in damage and shattering.

In addition to that, because of the drastic temperature change, it might expand and contract unevenly.

The oven’s high heat will cause the glass dish to expand, but the cold body will make it contract. The glass loses its structure due to unequal expansion and contraction, and it will eventually break.

How do you put a glass cold baking dish in the oven?

You will have to put a cold baking dish in the oven in such a way that it won’t shatter while baking. To ensure that, you will have to avoid causing thermal shock.

As thermal shock can occur due to heavy temperature changes, you should set the glass baking dish at room temperature before putting it into the oven.

You should also put the glass cookware into the oven before preheating it and let the oven and dish heat simultaneously. By doing so, you will make the glass temperature rise uniformly, preventing breaking due to uneven expansion and contraction.

What can cause glass to break in the oven?

Even if your glass cookware is oven-safe, it might break in the oven for various reasons. Let’s take a look at the reasons that can cause the glass to break in the oven.

Thermal shock:

Thermal shock is one of the main causes for your glass to break in the oven. It occurs due to rapid temperature change.

This thermal shock is just too much for the glass to handle. So, the glass cookware can shatter into hundred pieces if placed on the oven directly from the freezer.

Very high temperature:

If you place the glass cookware straight into a heated oven, the glass will expand way more than its expansion capacity. So, the glass might break or blow up because of the high heat.

That being said, how much heat a glass dish can withstand depends on its brand and quality. If your cookware isn’t of high quality, it will likely shatter at a lower temperature than a few other units. 

Existing wear and tear:

During use, glass is subjected to a lot of wear and tear, resulting in scratches. The scratched glass loses its capability to hold together and can’t withstand a change of shape.

The glass expands and contracts due to a change in temperature. So, the scratched glass will break quite easily when introduced to severe temperature changes. Needless to say, if you put glassware with existing wear and tear into the oven, it will break immediately. 

Cooking without liquids:

The glass cookware can blow up if you cook something on high heat in the oven without any liquids.

Due to the application of high temperature and the absence of any liquid, the food item will expand unevenly. This will put excessive pressure on the glass and eventually break it.

How to keep glass from breaking in the oven?

You can keep your glass dish from breaking in the oven quite effortlessly. You will just have to take a few precautionary measures to prevent the glass from baking in the oven.

Here are a few methods to keep glass cookware from breaking in the oven.

Defrost the glass:

If you put cold glass in the oven, it can break because of sudden temperature fluctuation. You can stabilize the temperature and avoid shattering by defrosting the glass cookware before putting it in the oven.

To defrost the glass, you should keep the cookware at room temperature until the glass temperature becomes normal. When you put defrosted glass into the oven, the temperature difference will be low, so the glass won’t crack. 

Ensure the glass is oven safe:

The oven-safe glass cookware is made with material that doesn’t expand and contract unevenly. They are also made to withstand high temperatures.

By cooking on oven-safe glass, you can prevent it from breaking in the oven. So, before cooking something on a glass dish in the oven, make sure that it is made with oven-safe material. 

Look for scratches in the glass:

When exposed to temperature changes, the glass which has cracks or scratches may shatter. Thus, prior to putting the glass in the oven, ensure it’s clear of small cracks or scratches.

Leave enough space for the food to expand:

A dish such as roast chicken, beef, and bakery items usually expands while being cooked. If you squeeze the food item into the glass cookware, the glass might break when the dish expands.

So, you should leave enough space for the food to expand without shattering the glass.

Can you heat up cold glass?

You should not heat cold glass even though glass is mostly microwave safe. This is because when you heat up cold glass, the temperature change from the glass is quite drastic. The heavy shift in temperature can cause thermal shock, resulting in cracks on the glass.

How to know if glass is oven safe?

The easiest way to know if the glass is oven-safe is by checking if the cookware has the oven-safe label in it.

Most glassware now provide labels indicating if they are oven-safe or not. In general, any transparent glass dish is oven-safe if it doesn’t have a metallic painted trim.

What temperature does glass break in the oven?

The oven-safe glass shouldn’t begin to melt or break until it reaches temperatures above 450 degrees Celsius. In addition to that, thermal variations can cause the glass to shatter.

Final Thoughts:

When you put cold glass in the oven, the temperature changes quite rapidly and unevenly. This heavy thermal shift can create cracks in the glass. However, you can prevent the cold glass from breaking by taking a few precautionary steps before setting it in the oven.