Canning Science Foundations Email Course & Newsletter
Ever wondered if there’s more to canning safety than the standard advice? There is.
What changes when you understand the biology
American canning guides say green beans need a pressure canner. Period. Germans have water-bathed the same beans for a century. They can’t both be safe.
Except they are. The biology is identical: spores are spores, heat is heat. What changes is the strategy. One tradition loads all the safety into a single industrial step. The other builds it from smaller layers that stack. Same science, two systems, different assumptions.
That’s the course. You stop memorizing rules and start seeing what they’re for, until you can look at any recipe and know exactly where the safety lives, and where it doesn’t.
About Julie Kaiser
Not a hunch, a career in the lab
I’m a molecular biologist. I spent a decade in virology and national security research labs before I ever wrote about food.
Then I moved to Germany, into a canning tradition the English-speaking safety world waves off. Not because it’s reckless. Because it runs on different assumptions, and nobody translated them.
The two systems are where the confusion starts. The biology is where it ends.