Pressure Cooker Canning
by Pat Veretto
Boiling Water Bath Canning
Buying Used Canning Equipment
Learn to Be Self Sufficient, Food-Wise
A boiling water bath is simple to use for some things, but pressure cooker canning is necessary for many vegetables, and all meats, poultry and seafood. Again, the food is packed into jars and closed with rings and lids, then put into canner. The difference is that a pressure canner uses two to three inches of water, just enough to create a pressure when closed and heated.
After the canner is closed, the pressure must be brought to a certain level depending on where you live (differing altitudes have different air pressures). Always follow a book or recipe closely when it tells you how long a food must be held at a certain pressure.
Clostridium botulinum is a dangerous microorganism that will produce spores in an airless condition and low acid foods, so they must be destroyed completely. Botulism, which can cause death, is the result of improperly canned food.
Pressure canning is similar to boiling water bath canning in some ways. The reason for canning some foods under pressure is to raise the temperature high enough to make food safe that isn't acid, or that has qualities (like meat) that make it spoil easily.
You'll need to gather your equipment first. For pressure canning, you'll need a canner with a dial or gauge (it should be checked each year before starting - call your local extension service - they may do it for free), rack, jar lifter, damp cloth, timer or clock, and an area in which to cool the jars.
Prepare the food, then fill the canner with two to three inches of water, set the rack in it and put it on to heat. Add food to jars according to your recipe and directions, and put each jar in the canner until it's full. Jars should not touch each other.
Fasten the lid securely and allow the canner to build pressure and vent steam for 10 minutes, then close the vent and wait until the pressure dial shows the pressure you need. If you're using a gauge, wait until it "jiggles." Turn down the heat slightly to keep the proper pressure and start counting time. If, for some reason, the pressure drops below what your directions call for, raise it again and start timing all over again.
When the time is up, remove the canner from the heat and allow it to lose pressure naturally. Don't try to cool it by running cold water over it. When it cools, carefully open the valve and allow any excess steam to escape, then open the lid, being sure to slant it away from you.
Take out the jars and put them on a cooling rack or towels to cool and leave at least an inch for air circulation between them. Don't move the jars for 24 hours, then check the seals, wipe the jars, label and date them and put them away in a cool, dark place.
Pat Veretto is a work-at-home grandmother who has homesteaded, homeschooled and happily lived frugally most of her life. She currently freelances.
Take the Next Step:
- New to canning? Take a look at the top 10 foods for home canning.
Share your thoughts about this article with the editor.