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Chowline: Canning and Home Food Preservation

With canning season in swing now, I have some home canning recipes that have been passed down through my family over decades that I want to try. With all the new techniques and information that have been developed regarding home food preservation, can I still use those old recipes?

While it’s a wonderful, cherished tradition in many families to preserve food based on recipes that were developed and honed over the years in grandma’s, great-grandma’s and great-great-grandma’s kitchens, you should review those recipes, and if they don’t match recipes that have been tested and researched by food safety experts, you shouldn’t use them.

photo: Getty Images

The National Center for Home Food Preservation is a valuable source for current research-based recommendations for most methods of home food preservation, says Kate Shumaker, an Ohio State University Extension educator and registered dietitian. OSU Extension is the outreach arm of the College of Food, Agricultural, and Environmental Sciences at The Ohio State University (CFAES).

The center was established with funding from the U.S. Department of Agriculture’s Cooperative State Research, Education and Extension Service (now called the National Institute of Food and Agriculture) to address food safety concerns for those who practice and teach home food preservation and processing methods, she said.

Precisely following the proper steps and recipes when home canning is important to help prevent botulism, a rare but potentially deadly illness produced by bacteria called Clostridium botulinum, she said.

These bacteria are found in soil and can survive, grow and produce a toxin in certain conditions, such as when food is improperly canned, according to the U.S. Department of Health and Human Services. The toxin can affect your nerves, paralyze you and even cause death.

That’s what happened in April 2015 when one central Ohio woman was killed and 24 others were hospitalized with botulism after eating potato salad that was made with improperly home-canned potatoes.

“Canning season can be from late May, when your spring vegetables and fruits come in, through fall and into the colder months, when people want to can meat and soups,” Shumaker said.

While canning is not really a complicated process, you do have to follow researched and tested recipes, she said.

“Home canning is a science, but it’s not the time to experiment — you can’t make up your own recipes,” Shumaker said. “A lot of things can affect the safety of your final product.

“It’s important not to alter the acid (pH) level of the food in the jar, the size of the pieces of food, the canning method or the processing time. Each of these items plays a role in the amount of time and heat it will take for the core (center) of the jar to reach a safe temperature to keep the food safe to eat and not make someone sick.”

Additionally, CFAES experts offer hands-on classes on food preservation and canning in several locations around Ohio and have produced several YouTube videos on the subject. They also offer recipes and other resources for food preservation and canning at and on Ohioline.

Chow Line is a service of the College of Food, Agricultural, and Environmental Sciences and its outreach and research arms, OSU Extension and the Ohio Agricultural Research and Development Center. Send questions to Chow Line, c/o Tracy Turner, 364 W. Lane Ave., Suite B120, Columbus, OH 43201, or [email protected].

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