Dear Home Ec 101,
I was given a whole bunch of glass canning jars and I was wondering if I could use them to freeze things like homemade stock? I don’t own a pressure canner, but don’t want these to go to waste.
You Really Frost My Glass
Some canning jars are excellent for freezing. Straight widemouth jars are safe in the freezer. Don’t forget to leave a good bit of space at the top, aka headspace, to allow for the expansion of water during freezing.
If your jars have shoulders either skip the freezer entirely or only fill them 2/3rds full. If you don’t leave a significant amount of space below the narrowed opening, the jar may break as the water in stock expands. You see, water isn’t smart enough to know it has room above the shoulders, it simply expands in all directions. Use care, as cleaning glass fragments out of a freezer doesn’t sound like much fun.
I use extra canning jars to store items like dried beans and odd grains I have in small amounts (wild rice, quinoa, millet, etc). Not only are they functional, they are pretty, too.
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