Can I Freeze Canning Jars?
The short answer is: It depends. While it's generally safe to freeze empty canning jars, it's important to consider the type of jar and what you plan to freeze in them.
Empty Canning Jars
Yes, you can freeze empty canning jars. They are made of durable glass, which can withstand the cold temperatures of a freezer. However, there are a few things to keep in mind:
- Heat the jars first. To prevent the jars from cracking, heat them up before freezing. This can be done by running hot water over them for a few minutes.
- Leave some space. Don't fill the jars completely with water or liquid. Leave some space for expansion as the water freezes.
- Proper storage. Make sure the jars are stored upright and not touching the freezer walls.
Filled Canning Jars
It is not recommended to freeze filled canning jars. The expansion of the contents during freezing can cause the jars to crack or break. This can be a major safety hazard and also ruin your food.
Exceptions:
- Certain types of food. Some foods, like broth, sauces, and soups, can be frozen in canning jars with a few safety precautions.
- Wide-mouth jars. Wide-mouth jars are less likely to crack than regular-mouth jars, but it's still important to leave enough space for expansion.
How to freeze food in canning jars safely:
- Use freezer-safe jars. Check the jar label to ensure it's freezer-safe.
- Leave space for expansion. Fill the jar to about 1 inch below the rim.
- Use a freezer-safe lid. Secure the lid tightly, but not too tightly.
- Label and date the jar. This will help you keep track of how long the food has been frozen.
Tips for Freezing Empty Canning Jars:
- Avoid freezing jars with metal lids. Metal lids can rust or become damaged in the freezer.
- Use a freezer-safe container. You can store your empty jars in a large freezer-safe container to keep them organized.
Remember: Freezing empty canning jars is safe, but it's important to do it correctly to prevent damage. Freezing filled canning jars can be risky and should only be done with certain types of food and safety precautions in mind.
