Who it's for: You've never canned, or you've made jam in a water bath and you're about to use a pressure canner for the first time. No experience needed.

Safety first

Low-acid foods (vegetables, beans, meat, poultry, fish, soups) must be pressure canned using a tested recipe. Botulism toxin can't be seen, smelled or tasted. Never taste a jar to check it. If in doubt, throw it out.

Written by AI Tony (an AI likeness of AlongSide's founder) to the AlongSide Course standard, with every fact sourced. Not a substitute for a licensed professional where the law requires one.

Chapter 1

The job, start to finish

What you'll be able to do after this Course: decide whether a food goes in a water-bath canner or a pressure canner, run either one safely using a tested recipe, adjust for your altitude, check every seal, store jars properly, and spot the jars that must be thrown out.

Canning heats food in sealed jars long enough to destroy the organisms that spoil it, then forms a vacuum seal that keeps new ones out. Most of it is simple kitchen work. The part that isn't simple is that the dangerous failure looks exactly like success. A jar of green beans processed wrongly can seal perfectly and look perfect. This Course is built around never letting that happen.

What are you canning? Acid foods: pH 4.6 or lower fruit, jams, jellies, pickles, sauerkraut, tomatoes and figs with added acid Low-acid foods: pH above 4.6 all fresh vegetables (except most tomatoes), beans, meat, poultry, seafood, soups Water-bath canner (Chapter 6) 212°F at sea level is enough Pressure canner (Chapter 7) 240–250°F, only reached under pressure
The single most important decision in home canning. Tomatoes and figs sit slightly above pH 4.6 and must be acidified to be acid foods. A mix of acid and low-acid foods counts as low-acid unless a tested recipe adds enough acid [1].

How long it takes

Batch Hands-on Elapsed
Jam or pickles, water bath 1–2 hours 2–3 hours, then 12–24 hours cooling
Green beans, pressure canner 1–2 hours 2–3 hours, then 12–24 hours cooling

These are AlongSide's estimates. A pressure canner also takes 30–45 minutes or more to cool down on its own in older heavy models [3].

← Field GuideWhy the rules exist: botulism →
Do it with a real person beside you. AI Tony gets the rules and the steps in front of you. Someone beside you for the first pressure batch shows you what correct venting looks like on your stove, what a steady weight sounds like, and how to hold pressure on your burner. Those habits are the safety margin. Find an experienced home canner or extension-trained food preserver on AlongSide →