Our zero-waste kitchen: how to freeze in glass jars
We have all heard of glass jars breaking as we freeze or defrost them and therefore most people think it’s probably a bad idea to freeze food in jars.
But guess what? It’s actually pretty easy and almost impossible to break jars if you follow these simple tips:
- For small items such as berries, all you have to do is wash and drain them and pour loosely into a jar.
- Bigger items such as vegetables, should be cut and portioned before pouring in a jar.
The problem with liquids comes when they expand as they freeze, this is where most jars will break.
Tip n1: Leave enough space at the top of the jar so when it expands the liquid doesn’t take up more volume than the jar has.
Tip n2: Heated items should only be frozen once they are cooled down to room temperature.
Thawing frozen food:
Thawing small items usually doesn’t cause any issues. You can easily pour out the desired amount and simply put the rest back into the freezer
Fluids on the other hand should be thawed slowly. Ideally, you should place the jars into the refrigerator for a few hours. Never place jars straight from the freezer into hot or boiling water. Breaking glass is almost guaranteed.