Beginner’s guide to Freezing Food using Canning Jar

The fast pace of our everyday lives has taught us to evolve and adapt meal-prepping methods that save our time. 

We’ve seen our grandmothers and mothers plan and prepare elaborate meals daily. Imagine shopping for groceries, cutting and chopping veggies, cooking a proper meal, and cleaning daily! Exhausting, isn’t it?

Families are getting busier by the day. It is ideal to set aside a day to plan, cook and freeze meals that you can consume for weeks after.

Advantages ? 

  1. Saves time.
  2. Allows you to buy in bulk. Hence, it’s cheaper. If you buy from the farmer’s market, it’s also fresher.
  3. You can enjoy seasonal fruits and vegetables all year long.
  4. You can avoid ordering junk food regularly!

Canning or mason jars are ideal for freezing food that retains its flavor and freshness. Many people complain about the breakage of canning jars.

Hence the question, is it okay to freeze food in mason jars?

YES! You can!

Let’s check out some cool tips…

Five Tips For Freezing Food Using Canning Jars

1. Choose Mason Jars with Tempered Glass

The supermarket glass jars you love to reuse are suitable for canning dried food items. However, these are made from non-tempered glass that isn’t ideal for freezing. Canning jars used for freezing food should be made with tempered glass.

Tempered glass is about 4 to 5 times stronger than regular glass. Tempered Glass Jars are durable and less susceptible to breakage.

2. Choose the Correct Shape of Canning Jar

Canning jars usually come in two shapes - straight-sided jars and jars with shoulders

Straight-sided mason jars are perfect for freezing. They are wide-mouth jars, making it easier for you to store food. Wide Mouth Mason Jars also allow the food to expand while it freezes.

Mason glass jars with shoulders are traditional small-mouthed jars, which are more prone to breakage. These glass jars can store less food since you have to leave an inch or two of space below the shoulders to allow the expansion of food.

3. Cool The Jars Before Freezing

Thermal shock is detrimental to canning jars and will most likely lead to breakage. Hence, it is advisable to put the jar in the refrigerator to cool first and then in the freezer. It will ensure that the temperature change is gradual and protect your glass jar from breakage.

4. Leave Space for Food to Expand

Super Important! Food and liquids expand when frozen. If you fill your mason jar up to the brim, the expanded frozen food puts pressure on the glass jar leading to breakage. Leave an inch or two of space at the top to allow easy expansion.

5. Make Sure to Thaw Frozen Jars Carefully

Again, Mason Glass Jars are sensitive to thermal shock. So if you want to use frozen food, you need to plan. Frozen jars should be left to thaw at room temperature. It’s tempting to place it in a hot water bowl or run some warm water over it, but that would break your glass jar. Let it thaw up to 90 percent before you heat it!

Pro Tip: Leave the freezer jar on a towel to keep your counter from getting messy!

If, despite all your efforts, your mason jar does break, don’t let it disappoint you! You’ve opted for a sustainable option of storing your food by avoiding mason plastic jars, and we’re proud of you!

Choose the appropriate canning glass jar for your needs. Follow these tips and enjoy the long-term usage of these storage mason jars! Take a look at our American-made Mason jars Click Here