·

How to Store & Freeze Leftovers in Mason Jars Safely

Sharing is caring!

Are you often left with too much food after a hearty meal? Are you wondering about the best way to Store and freeze Leftovers in Mason Jars Safely without contributing to food waste? Look no further than the trusty glass Mason jars— a great way to safely store and freeze leftovers. 

The best tips for utilizing glass Mason jars include choosing high-quality freezer-safe jars, leaving ample headspace at the top to accommodate expansion during freezing, and investing in a wide-mouth funnel for a mess-free filling experience. These jars not only provide a secure environment for your leftovers but also serve as a sustainable solution to reduce food waste. I will share the best way How to Store & Freeze Leftovers in Mason Jars Safely, offering comprehensive tips and guidelines to ensure the preservation of food quality while preventing any risks of jar breakage or compromised storage.

We use glass containers pretty much for everything, including freezing leftover food, such as spaghetti sauce, chicken broth, soups, & so much more. When my husband makes homemade chicken noodle soup, he makes a huge stock pot so, that we will have leftovers for a few more meals. Another main reason why I like to freeze any leftovers in mason jars.

By freezing in glass Mason jars, you not only preserve the freshness of your food but also save on food waste. Embrace this simple and effective method to revolutionize the way you handle leftovers, a small change that makes a big impact on both food preservation and waste reduction.

Can You Freeze Mason Jars?

Yes, you can freeze Mason jars, but it’s crucial to follow some guidelines to prevent breakage. Choose Mason jars designed for freezing, leaving enough headspace at the top for expansion during freezing. Ensure the contents are at room temperature before freezing, and use lids specifically made for freezing to allow for flexibility. Gradual temperature transitions, both when freezing and thawing, help maintain the integrity of the glass. Following these precautions makes freezing Mason jars a safe and convenient way to store leftovers for later use.

A varies sizes of mason jars used for storing & preserving food.

It’s important to get the right size jars for food storage

Selecting the right size jars is a crucial aspect of effective food storage. Opting for wide-mouth jars provides convenience during both the filling and retrieval of contents. These jars come in various sizes, allowing you to choose the perfect fit for your specific storage needs. Whether you’re storing bulk quantities or smaller portions, having a selection of wide-mouth jars in various sizes ensures flexibility and efficiency in organizing your pantry or refrigerator. This thoughtful consideration of jar size enhances the practicality and convenience of your food storage solutions.

What mason jars are freezer-safe

Many reputable brands produce freezer-safe Mason jars, designed to withstand the extreme temperatures associated with freezing. Some popular and widely recognized brands include:

  1. Ball: Ball is a well-known brand that produces Mason jars specifically designed for freezing. Look for their Ball Freezer Jars or Wide Mouth Pint and Half Pint Freezer Jars.
  2. Kerr: Kerr is another trusted brand in the canning and preserving industry. Kerr Freezer Jars are designed for freezing and can be a reliable choice for storing leftovers.
  3. Bernardin: Bernardin is a Canadian brand known for its canning supplies. They offer freezer-safe jars suitable for storing food in the freezer.

When selecting Mason jars for freezing, always check the product details and labels. Look for jars explicitly labeled as “freezer-safe” or jars with features such as straight sides and wide mouths, which are designed to allow for proper expansion during freezing. It’s essential to follow the manufacturer’s guidelines for freezing to ensure the safety of both the jar and the stored food. Using jars not explicitly designed for freezing may result in breakage and compromise the safety of your leftovers.

Materials Needed for Storing & Freezing Leftovers

  • Wide Mouth Funnel
  • Wide Mouth Jars
  • Regular Mouth Jars
  • Plastic Lids (Optional)
  • Permanent Marker
  • Ladle
Mason jars with plastic lids on a linen cloth used for storing & preserving food.

Storing Leftovers in Mason Jars: A Comprehensive Guide

By following these simple steps, you can safely store and freeze leftovers in Mason jars, preserving both the quality of your food and the integrity of the glass jars.

Before Freezing Your Mason Jars

It’s important to have clean jars & check for any signs of cracks. Not all jars are freezer-safe, so be sure to select the proper glass jars for freezing.

Choosing the Right Glass Jars

When storing leftovers in Mason jars, opt for high-quality glass jars with a reputation for durability. Ensure they are specifically designed for freezer and canning use. 

What are the best mason jars for freezing leftover food?

The best Mason jars for freezing leftover food are those specifically designed for freezer use. Look for jars labeled as “freezer-safe” or “canning jars” from reputable brands. Regular glass jars may not be able to withstand the extreme temperature changes associated with freezing, leading to breakage. Wide-mouth Mason jars are often recommended for freezing because they allow for easier filling and retrieval of food. Additionally, jars with straight sides are preferable, as they provide more even expansion during freezing.

Consider brands like Ball, Kerr, or other well-known canning jar manufacturers, as they produce high-quality jars designed to withstand freezing temperatures. Always follow the manufacturer’s guidelines and recommendations for freezing to ensure the safety and longevity of both your food and the Mason jars.

The Importance of Head Space

Always leave sufficient head space at the top of the jar to allow for expansion during freezing. This minimizes the risk of jar breakage due to the contents expanding as they freeze.

Selecting the Right Size Jars

Use appropriately sized jars for your leftovers to avoid overfilling. This helps in maintaining the recommended head space and prevents potential breakage.

Three differently sized empty mason jars on a linen towel.

Wide Mouth Funnel for Easy Filling

Invest in a wide mouth funnel to facilitate easy and mess-free filling of jars. This ensures that you can efficiently transfer leftovers without spillage, maintaining cleanliness.

Filling Jars Correctly

Fill the jars with the leftovers, leaving the recommended head space at the top. Overfilling increases the risk of jar breakage during freezing.

Freeze-Fill Line Guidelines

Be mindful of the freeze-fill line indicated on the Mason jar. Avoid surpassing this line, as it accounts for the expansion of contents during freezing and helps prevent breakage.

Allowing Leftovers to Cool

Before transferring leftovers to Mason jars, allow them to cool to room temperature. Hot food placed directly in the jars can cause thermal shock and increase the risk of breakage.

Avoiding Extreme Temperature Changes

Mason jars are designed for freezing, but sudden temperature changes can lead to breakage. Avoid placing hot jars in extreme cold or vice versa. Gradual temperature transitions are key.

A large mason jar filled with chicken noodle soup that just came out of the freezer.

Plenty of Room in the Freezer

Arrange filled jars in the freezer with plenty of room between them. This promotes even freezing and prevents jars from sticking together, minimizing the risk of breakage. 

Tip: Use a plastic bin to hold the jars.

Checking for Jar Breakage

After freezing, inspect jars for any signs of breakage. Discard any jars with cracks or compromised seals to ensure the safety of your stored leftovers.

Safely

When ready to use the leftovers, thaw the jars in the refrigerator rather than at room temperature. This gradual thawing process helps maintain the integrity of the glass.

Using Frozen Leftovers Within a Safe Time Frame

Consume frozen leftovers within a reasonable time frame to ensure food safety. Follow recommended guidelines for the storage duration of various types of leftovers. Mark the jars with a marker with the contents & date.

Food Type Matters

Some foods, like soups and stews, may expand more when frozen. Take the nature of the food into account when leaving headspace at the top of the jar. If you’re unsure, consult specific guidelines or your jar manufacturer’s recommendations.

A crate filled with a variety of mason jars under a table next to old crocks & egg basket..

Commonly Asked Questions

These commonly asked questions and their answers provide valuable insights into the safe and effective storage of leftovers in Mason jars, emphasizing the importance of preventing jar breakage and ensuring overall food safety.

How can I prevent jar breakage when freezing leftovers in Mason jars?

To prevent jar breakage, ensure that you choose high-quality glass Mason jars designed for freezing. Leave room for enough headspace at the top to accommodate the expansion of the contents during freezing, reducing the risk of breakage.

What should I do if I notice a cracked jar when preparing to freeze leftovers?

If you spot a cracked jar, do not use it for freezing. Cracked jars are more likely to break during the freezing process, compromising the safety of your leftovers. Discard any jars with visible cracks.

Can I use metal lids when freezing leftovers in Mason jars?

You can use metal lids, however, when adding lids, screw on loosely to allow for expansion during the freezing process. Opt for plastic lids for flexibility. Once the food is completely frozen, tighten the lid once counterclockwise. Metal lids may not provide the necessary flexibility, and they could be prone to rust over time. There are lids designed for freezer or canning use to ensure a secure seal, such as M.E.M Food Storage Plastic Lids. Furthermore, if you do not have plastic lids, metal seals & rings will work in a pinch.

Three large mason jars filled with chick stock ready for the freezer to preserve.

.

Is there a general rule for leaving enough room at the top of the Mason jar when freezing leftovers?

As a general rule, leave the recommended headspace specified by the jar’s guidelines or approximately 1 to 2 inches at the top. This allows room for expansion during freezing, minimizing the risk of broken jars.

What are some safe ways to thaw leftovers stored in Mason jars?

For safe thawing, transfer the Mason jar from the freezer to the refrigerator. Avoid abrupt temperature changes, as this can lead to thermal shock and potential breakage. Gradual thawing helps maintain the integrity of the glass.

Are there any additional precautions to prevent broken jars in the freezer?

Arrange filled jars in the freezer with enough room between them. This promotes even freezing and prevents jars from sticking together, reducing the risk of broken jars due to contact or pressure. Wrap the jar in a towel to prevent jars from touching.

Can any glass jar be used for freezing?

Not all glass jars are suitable for freezing. While glass is generally a freezer-safe material, there are specific considerations for jars intended for freezing. Regular glass jars, like those used for storing jams or pasta sauces, may not be designed to withstand the extreme temperature changes associated with freezing.

Final thoughts…

Storing leftovers in Mason jars can be a practical and sustainable solution, but it requires careful consideration and adherence to certain guidelines. Opt for high-quality glass Mason jars designed for freezing, leaving ample headspace to accommodate expansion with the contents of the jar during freezing. Using wide-mouth jars and a funnel can make the process more manageable and mess-free. Always let leftovers cool to room temperature before freezing to prevent thermal shock. 

Remember to choose appropriate lids and avoid abrupt temperature changes to prevent jar breakage. By following these steps, you can not only ensure the safety of your stored food but also contribute to minimizing food waste and promoting a more sustainable approach to leftovers. Storing leftovers in Mason jars is not just about preserving food; it’s a mindful and practical way to extend the life of your meals while maintaining their quality.

Name image for Dusty at Linen and WildflowersIf you want to follow along on our home restoration/renovation plans and all of our exciting antique & thrift finds, be sure to check out Linen and Wildflowers on FacebookInstagram, and Pinterest! And don’t forget to sign up for our newsletter to receive updates.

5 Best Tips for Cleaning Kitchen Cabinets

The Best 10 Tips for Organizing Your Home Workspace

10 Simple Organization Tips for Your Laundry Room

Pros & Cons for Using Glass Jars for Food Storage

Can you use Antique Jars for Canning?

Using Mason Jars for Storage

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.