09/18/2026
FOOD SCIENCE FRIDAY: Don’t do what I did.
See this jar of corn?
Notice anything missing?
Water. I forgot the water.
I packed the corn, loaded the pressure canner, processed it for the full time… and somehow completely skipped adding boiling water to the jars.
And before anyone asks: yes, I tasted it. It was bad. 😂
The corn was noticeably darker, dry, chewy, and had that overcooked flavor. Turns out the water isn’t just along for the ride.
The liquid helps transfer heat evenly throughout the jar while also protecting the quality of the corn during processing. Without it, you essentially have pockets of corn surrounded by air instead of hot liquid. Air transfers heat very differently than water, so you’ve changed the way heat moves through the jar.
And that’s where the food-safety issue comes in.
Pressure canning instructions aren’t based solely on the temperature and pressure inside the canner. The processing time is validated for a specific food, preparation method, packing method, jar size, and liquid level. Remove the liquid, and you’re outside that tested process.
So despite these jars sealing beautifully, they aren’t considered safely shelf-stable using the tested method.
Food Science Friday lesson:
A sealed lid doesn’t mean a food was safely processed.
And apparently water is also an important ingredient if you’d like your canned corn to taste like corn instead of corn jerky. Who knew right? 😩😒
Science was learned. Corn was sacrificed. 🤦♀️