The Big Pot and What Actually Counts as a Canner
The pot is where people either relax or panic, so let's settle it and get you in the relax camp.
You do not need a special machine. You do not need to buy some enamel canner with a matching lid and a rack for forty bucks before you've made a single jar of jam. What you need is a big pot, deep enough to cover your jars with an inch or two of water over the tops, plus room for the water to boil without splashing everywhere.
That's the requirement. All of it.
What actually counts
Short checklist:
- Deep enough. Your jars sit on a rack (not touching the bottom of the pot directly) with at least an inch of water over the tops, two inches is safer. Measure your jar height, add a few inches for the rack and the water, and that's the depth you need.
- Wide enough. Jars should sit without jamming into each other or the sides. A little wiggle room.
- Has a lid. You're holding this at a boil for a while, and you don't want to babysit evaporation the whole time.
- Something for a rack. The actual canning racks are nice, handles that hook onto the pot edge, real convenient. But I've used a round cake cooling rack in a pinch, and I've heard of people tying canning rings together with string on the bottom of the pot. The point is only to keep the jars off the direct heat of the pot floor so they don't crack.
If your big stock pot, the one you use for soup or for boiling pasta for a crowd, is deep enough, you already own a canner. Most people do and don't know it.
What does NOT count
A few things people ask me about that don't work:
A pot that's too shallow. If you can't get an inch of water over the jar tops, you won't process evenly, and that's not a corner to cut.
Your Instant Pot or pressure cooker used as a water bath. Different animal, different lesson, I don't teach that side of things and I'm not going to wing it here.
Anything you're not comfortable having on your stove at a full rolling boil for 10, 15, 20 minutes. Check your burner size against your pot size too. If your pot is way bigger than your biggest burner, the edges won't heat evenly and you'll fight it the whole time.
On sterilizing jars first
Quick opinion, while we're on gear and process. If you're processing your filled jars for 10 minutes or more in the water bath, you do not need to pre-sterilize the empty jars. The boiling water bath handles it. I used to scrub and boil every jar ahead of time like it was a surgical procedure, an hour of my life I wasn't getting back. Wash them hot and soapy, rinse well, keep them warm until you fill them, and let the actual canning step do the sterilizing. A lot of older recipes tell you to sterilize first out of habit, not need.
(If your processing time runs under 10 minutes for some reason, that's a different conversation, but almost nothing we do in this class falls under that line.)
The step that ruins people, and it's not the pot
Since we're on gear, I have to plant this here, because it comes up every single time and it has nothing to do with the size of your pot.
I did a whole batch of pickles one year and forgot the salt. Completely forgot it. Not short on it, absent, like it never existed in my kitchen that day. Proud of myself too, jars lined up, lids popped and sealed, the whole thing. Opened one in November feeling like a queen. Tasted like sad wet cucumber water. Brett ate one to be nice and I made him stop, watching him choke it down was too depressing for both of us.
The point of that story isn't the salt. It's that the recipe matters as much as the pot. You can have the perfect canner, the right depth, the right rack, and still ruin what's going into the jar if you're moving too fast or not reading your own recipe carefully. Slow down on the ingredient list even when you're itching to get to the fun part with the boiling water.
A word on safety here, plainly
A big pot of boiling water on your stove for a stretch is real heat and real steam. No need to be dramatic, but don't get casual either. Keep the handle turned in so you don't catch it walking by. Lower jars in and lift them out with a jar lifter, not tongs, not your hand wrapped in a towel, an actual jar lifter, they're a few dollars and worth every cent. And when you take the lid off the pot, tilt it away from your face. Steam finds you if you're not paying attention.
Before next time: dig through your kitchen and settle which pot you already own is going to be your canner. Measure it, depth and width, and bring those numbers with you.