Although commercially canned corn is standard pantry fare, it isn’t necessarily the first vegetable one thinks of when diving into summer canning. Why are low acid vegetables like peas, asparagus and corn so often left of the list? It all comes down to bacteria.
Using pressurized steam, specialized canning equipment can reach temperatures in excess of 240 degrees, necessary to destroy dangerous bacteria. Pressure is controlled by adjusting the temperature of the stovetop burner on which it rests, and a regulator valve ensures that safe levels cannot be exceeded. Pressure canning is safe, easy and reliable, but unlike water canning, it requires an investment that may intimidate the casual home canner.
Ready to take the plunge? Pressure canners can be purchased for as little as $60, and for the home canner ready to take that next step, there’s no better time. Canning that plentiful (and cheap) summer corn is an easy first project that will pay off all year long.
How to Pressure-Can Corn
- 4 ½ pounds of corn (in husk) for each quart to be canned
- ¼ teaspoon salt per quart
Using a sharp knife or a corn zipper, cut the kernels from the cob, taking care to take off as little of the cob as possible.
Fill sterile quart canning jars with corn (do not compress), leaving 1 inch of head space.
Pour boiling water into each jar to cover corn.
Cap jars with lids and bands and process in pressure canner at 10 psi for 85 minutes.
Originally: Full Steam Ahead! How to Can Corn