Canning 101

August 30th, 2010, by Erin

This week, a bit of a tutorial. Have you ever contemplated canning as a way to save some of your seasonal harvest for the forty weeks of the year when there’s not a fruit share?

If so, you’re not alone, as going homesteader is hip these days – or so I gather by a recent article gracing the front page of the weekend Philadelphia Inquirer on “21st Century Homesteading.”

Among other pastoral pursuits, the article highlights home canning: “Chris Scherzinger, general manager of Jarden Home Brands, maker of Ball and Kerr home-canning supplies, reports a 60 percent increase in sales from 2007 to 2009, the biggest hike since the 1970s. ‘The economy is certainly a factor,’ he says, ‘but so is the growing interest in gardening and fresh food.’” A poke around the internet turns up enthusiastic blogs such as (Philadelphia’s own) Food in Jars and Tigress in a Jam These are not your grandmother’s canning resources, with recent recipes such as Nectarine Preserves with Summer Savory and White Pepper and White Peach Sauce with Vanilla.

Well, if you’ve never tried canning and you’re interested in giving it a try, canning peaches (straight up, nothing fancy) is a great place to start. Forget Labor Day, or Back to School, the real harbinger of the end of summer is the peach finale. Just a few more weeks, folks, so get ‘em while they last. This realization set me in a bit of a panic this week, dropping everything for an afternoon or two so I could “put up” my personal stash of peaches for the winter.

Peaches are “easy” because they’re a high-acid food that you can raw pack. Translation: you can process them in a hot water bath (you don’t need a pressure canner), and you can pack them into jars without cooking them first, which saves you a step and some extra dirty dishes. Basic canning is not difficult; it just takes time and the ability to follow directions. The big concern in canning is preventing botulism. We can see, smell, or taste many problems caused by microorganisms in our food (moldy bread, spoiled milk), but this is not the case with botulism, and it’s no joke. The tiniest amount of botulism is deadly. But good news: it simply can’t survive in a high-acid environment, and this includes peaches. If this is your first time canning, please review the basics and make sure you’re being safe at the USDA’s Complete Guide to Home Canning or the Ball canning jar site, which has a useful FAQs section.

The best peaches to use are ones that are firmly ripe, probably about two days after you bring the fruit share home. Yellow or white or a mixture, it’s up to you. I found that about 6 medium peaches or nectarines fills one quart jar. You’ll want to prepare a syrup, which will help the peaches keep their shape, color, and flavor. You can use sugar or honey; I used a honey syrup that consisted of 1 cup honey to 3 cups hot water, and this amount was enough for six quart jars. The proportions for your syrup are flexible – even using water would be safe. For a light sugar syrup, combine ½ cup sugar with 2 cups water. For a heavy sugar syrup, combine 2 cups sugar with 2 cups water. Or you can choose any quantity in between.

Things you’ll need:
canning jars with (new) lids and screw bands*
a large pot big enough to hold your jars plus a few inches of water above them
a small pot large enough to contain your lids
a medium pot for boiling your syrup
a ready supply of clean dish towels
a skinny rubber spatula
peaches
sugar or honey

* You can reuse proper canning jars and the screw bands, but you should always use new lids. I prefer the wide mouth jars because they’re easier to fill and to clean. Either pints or quarts will work.

Things that are nice to have:
a canning rack (holds your jars in place during processing)
a canning funnel
canning tongs
a kitchen thermometer
several mixing bowls
lemon juice
whole spices, such as cinnamon sticks, cardamom pods, or cloves

Step by Step:

1. Fill your large pot with your clean, empty jars and add enough water to cover them with about two inches of water. (Note: when the jars are filled, the contents will displace some of this water.) You can use a canning rack to hold your jars in place, or, if not, a trick I learned from the Italian grandma of a friend of a friend: cushion your jars with towels. You don’t want the jars to hit each other or the sides of the pot. Start heating the water. It’ll take awhile. You want to bring the water to about 140°, or when tiny bubbles just start to appear on the sides of the jars. Do not let it come to a boil at this point.
2. Place your new lids and screw bands in the small pot. Cover with water and bring to a simmer. Then just leave them in the hot water until you’re ready for them.
3. Make your syrup, and start heating it. You’ll need it to be at a boil when it’s time to fill your jars.
4. Prepare your peaches. You’ll want to slice and peel them. You can blanch the peaches in boiling water to help remove the skins, but I find that when they’re nice and ripe, it’s just as easy and less mess to simply peel them with a knife. I’ve found that a small, serrated knife works best. I like to cut the peaches into eighths or even smaller, so that they’re easier to pack into the jars. As you cut them, you can drop them into a bowl of water to which you’ve added a teaspoon of lemon juice to prevent them from darkening.
5. Pack your hot jars with the peach slices. If you’d like, you can add whole spices, such as cinnamon, cardamom, or cloves. Pack the fruit in as tightly as you can, then top it off with your boiling syrup, leaving a ½ inch of headspace between the liquid and the rim of the jar. To remove any air pockets, run your spatula around the inside edges of the jar, and correct the amount of liquid if needed to maintain that ½ of empty space.
6. Carefully wipe the jars with a clean, damp cloth; you especially don’t want any food to be left on the rims of the jars (where the lid meets the jar), or it will prevent a good seal. Place the lids on the jars and gently screw on the bands.
7. Place the jars back into the water bath. Be careful that the water hasn’t reached a boil while you’ve been filling the jars – a drastic temperature difference could make the jars crack. Make sure that there is two inches of water over the tops of the jars. Cover the pot, and bring the water to a boil (this can take awhile).
8. As soon as your water boils, set a timer: 30 minutes for quart jars, 25 minutes for pint jars. Make sure that the pot stays covered and the water stays at a full boil and completely covers the jars for the entire processing time.
9. When the time is up, turn off the heat. I like to let the jars sit in the water bath for a good ten minutes; if you take them out immediately, the contents can leak out of the lid, ruining your seal. Remove the jars to a wooden rack or onto a counter covered with a few dry towels, to prevent cracking. Let them cool, untouched. Check them to see if the center of the lid is down and stays down when you press on it. If so, your jar has sealed. If not, you should reprocess your jar, keep it in the fridge, or throw it in the freezer.
10. Enjoy your peaches sometime in midwinter, when the last apples have been eaten and the fruit CSA seems like a distant memory. It might be a far cry from feeding your family all winter from a cellar-full of jarred goods, but it’s one small, satisfying step towards being a bit more involved in your personal food system.

If this piques your interest, and you’d like to learn more, a few good places to start are Preserving Summer’s Bounty by the Rodale Food Center (where I got most all of this information) and The Complete Book of Year-Round Small-Batch Preserving: Over 300 Delicious Recipes by Ellie Topp and Margaret Howard, which is geared toward someone canning in rather small batches in the home kitchen.

Comments or questions? You can contact me at northstarerin@gmail.com.
Past, present, and future writings posted on my blog (link to: http://fruitsunheardof.wordpress.com/)

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One Response to “Canning 101”

  1. Sheri says:

    I’ve been wanting to try canning for a long time, and this article was just what I needed to get started. I tried it, and it was easier than I expected. Thank you so much!

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