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Can You Freeze Food in Mason Jars? The Answer Might Surprise You

Mason jars have become increasingly popular for a variety of uses such as home decor, DIY projects, and of course, food storage. They’re practical, reusable, and aesthetically pleasing. However, one question that often stumps avid mason jar users is can you freeze food in mason jars.

Can you safely store your favorite soups, sauces, or leftovers in mason jars without any issues? Read on to learn more about the benefits of using mason jars for food storage and how to properly freeze food in them.

The Benefits of Using Mason Jars for Food Storage

Mason jars have become quite popular for food storage due to their sturdiness and versatility. One of the main benefits of using them is that they’re made of glass, which means they’re free from harmful chemicals like BPA that can be found in some plastic containers.

Glass is also non-porous, so it doesn’t absorb odors or flavors from food, keeping your ingredients fresher for longer. More importantly, mason jars are airtight when properly sealed, so they help maintain the quality of the food stored in them, making them ideal for freezing.

Plus, they are eco-friendly and reusable, reducing waste and saving you money in the long run.

Can You Freeze Food in Mason Jars?

So, can you freeze food in Mason jars? Absolutely! Mason jars are a versatile and reliable option for freezing various types of food, including soups, sauces, fruits, and vegetables. These glass containers are designed to withstand temperature fluctuations, making them ideal for preserving and storing frozen items.

However, it’s essential to ensure you’re using the right kind of Mason jar and following the proper freezing techniques to avoid potential issues like breakage or food spoilage.

For instance, it’s usually recommended to use jars with straight sides and wide mouths to reduce the risk of breakage due to the expansion of freezing food.

Additionally, remember to leave sufficient headspace, or empty space, at the top of the jar to accommodate the expansion of frozen contents.

As a general guideline, leave ½ inch for pints, 1 inch for quarts, and 1-2 inches for large jars or containers filled with liquids (or simply stick to the guidelines provided by the manufacturer or National Center for Home Food Preservation).

Overall, freezing food in Mason jars is a safe and convenient method as long as you take the necessary precautions, such as choosing the right jars, preparing them correctly, and adhering to proper freezing techniques.

Stay tuned for further information on selecting the best Mason jars for freezing, along with helpful tips for freezing various foods and avoiding common pitfalls.

Choosing the Right Mason Jars for Freezing

To ensure the best results when freezing food in Mason jars, it’s crucial to choose the right jar type. 
First, opt for jars specifically designed for freezing or those marked as “freezer-safe.” These are not only made of thicker glass but also have a lower risk of cracking. 

Additionally, consider the jar’s size and shape. Straight-sided jars (without a neck) are perfect for freezing because they provide extra room for your food to expand as it freezes, reducing the likelihood of breakage. 

Lastly, using jars with a two-piece lid (a flat metal disc and a separate screw band) will provide a tighter seal, keeping your food fresh and free of freezer burn.

Properly Preparing the Jars for Freezing

Now that you’ve chosen the right mason jars for freezing, it’s time to properly prepare them for freezing. This step is crucial to ensure the safety and longevity of your food. First and foremost, always start with clean, dry jars.

Wash them thoroughly with soap and warm water and allow them to air-dry on a clean towel.

Next, leave some headspace at the top of the jar to account for the expansion of the food as it freezes. This is especially important when freezing liquids or foods with high water content.

A general rule of thumb is to leave a ½-inch headspace for narrow-mouth jars and a 1-inch headspace for wide-mouth jars. You can use a ruler or a headspace measuring tool to help.

Before securing the lid, check the jar’s rims for any chips or cracks, as these defects may prevent proper sealing and can lead to breakages. Once you’ve made sure the rims are in good condition, place the lids and bands on the jars, tightening them just enough so they don’t come loose during expansion but not too tight.

Lastly, label and date each jar so you can keep track of the contents and their shelf life. Permanent markers or freezer-safe labels are recommended for this purpose.

Once your jars are properly prepared, you can confidently freeze your food in mason jars, knowing that you’re preserving the taste, quality, and safety of your meals. Keep reading for tips on freezing different types of food in mason jars and potential risks to avoid!

Can You Freeze Food in Mason Jars

Tips for Freezing Different Foods in Mason Jars

Freezing different foods in mason jars requires paying attention to a few important tips. When freezing liquids, such as soups or sauces, always leave an inch or two of headspace, as liquids will expand during the freezing process.

For solid foods, consider pre-freezing them on a baking sheet before transferring them to the mason jar. This can help prevent the food from sticking together and ensure even thawing later on.

Label your jars with the date and contents, to track what’s in your freezer, and how long it has been stored. Finally, make sure to always use straight-sided jars, as they are less likely to crack in the freezer.

Potential Risks and Mistakes to Avoid when Freezing in Mason Jars

While freezing food in Mason jars is a convenient and practical way to store food, it’s important to be aware of potential risks and mistakes in order to avoid wasting food or damaging the jars. 

One key mistake to avoid is overfilling the jars; leave ample headspace to accommodate the expansion of food when it freezes. Also, avoid using jars with shoulders or tapering shapes which can trap food and cause the jar to break. 

Additionally, be cautious when placing hot foods directly into the jar, as this can cause thermal shock and cracking. By being aware of these potential pitfalls, you can successfully store your food in Mason jars and prevent waste.

Cracking and Breaking of Jars

Despite taking all the necessary precautions, sometimes mason jars can still crack or break during the freezing process. This may be due to stress caused by the expanding food or temperature fluctuations, and older or defective jars are more susceptible.

To minimize the risk of cracking, ensure you’re using high-quality jars, giving enough headspace for expanding food, and not subjecting the jars to sudden temperature changes.

Thawing Problems

When it comes time to thaw your frozen food, be sure to allow room for the contents to expand. Keep in mind that it’s best to avoid sudden temperature changes.

One method is to transfer the jar from the freezer to the refrigerator for a few hours, then place it in a bowl of cool water before finally bringing your dish to room temperature. This will minimize the risk of cracking while ensuring your food is safely thawed.


Freezing food in Mason jars is a convenient and eco-friendly method of food storage. By selecting the right jars, preparing them correctly, and following guidelines for various food types, you can successfully avoid any risks or complications. Give it a try and enjoy delicious, well-preserved meals!