How to sterilize glass jars?

There are many techniques for sterilizing glass jars and jars in minutes. Let’s find out how to do it in the pot, in the oven and in the microwave and all the tips for impeccable sterilization!

The sterilization of jars and jars is a mandatory procedure when you want to prepare homemade preserves, jams, sauces, or vegetables in oil. Are you afraid of not being able to do it well, compromising your preserves? There are various techniques for sterilizing jars: today we will see how to do the classic boiling in the pot, but also how to make sterilization in the oven or in the microwave.

First, two general tips:

  • It starts with jars washed thoroughly with detergent and rinsed under running water.
  • Then, the jars should be used shortly after sterilization: the longer they remain in the air, the less safe they will be.

So let’s see how to sterilize, how to find out which technique is best for you, and all the tips for a perfect result!

How to sterilize glass jars in a pot

Sterilization in a pot is undoubtedly the most traditional method, but also the one that takes the most time. You can do this for both full and empty jars. Let’s see how!

How to sterilize empty jars

  1. To run it, you must insert the empty jars in a pot, wrapped in a cloth so that they do not collide with each other when the water boils.
  2. Then fill the pot with cold water and let it boil on low heat for about thirty minutes after boiling.
  3. Don’t forget to also put the caps and lids in the pot (it is important, however, that the jars are not corked).
  4. Finally, turn off the heat and let it cool.
  5. Finally, remove the jars and put them to dry upside down on a clean tea towel.

How to sterilize filled jars

To sterilize filled jars, especially with jams, repeat the same procedure.

Close the jars with the preserves inside, wrap them in a cloth and boil for about 20 minutes.
When everything has cooled, put them in the pantry.

How to sterilize the jars in the oven

A more “innovative” and faster method for sterilizing jars and cans is in the oven. This method is very convenient if you have the oven already on!

Turn it on at 100 ° C and wait for it to reach temperature. Insert the jars for 5 minutes. Turn off the oven and let the jars cool down inside. As soon as the temperature starts to drop, but the caps in the oven for about twenty minutes or until the oven has cooled down.

How to sterilize the jars in the microwave

An even more modern technique consists of microwave sterilization. This method is undoubtedly the fastest, as it will take three minutes.

  • First wash the glass jars, half fill them with water, and put them in the microwave.
  •  At this point, turn it on at full power for about three minutes, until you see that the water starts to boil.
  • Finally, using a kitchen glove or a tea towel, remove the jars.
  • Discard the water and let the cans dry on a clean tea towel.

Tips for sterilization and vacuum

 If your preserve is in oil or pickle it is not necessary to sterilize the full jars: oil and vinegar are already valid preservatives and above all, they could turn rancid. In this case, the advice is to sanitize perfectly only the empty jars. On the contrary, to sterilize jam jars, especially if it is slightly acidic, boil them a second time. • Your container will be vacuum-packed if the cap is no longer clicks-clacks and does not have a bulge in the center. • Do not put a cold liquid in a very hot jar and do not pour a very hot liquid in a now cold jar: the glass would shatter. • If possible, always change the caps every time: in this way freshness is guaranteed.

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