How To Can Pesto

You know that moment in August when your basil plant turns into a furry little tree, and you’re practically begging it to stop? You’ve made pesto for pasta, pesto for sandwiches, and even pesto for your morning eggs (don’t knock it till you try it). So, what do you do with the last mountain of leaves? You can that pesto, my friend, and save summer in a jar.

Why bother? Because winter deserves a little green.

Come January, when the snow is grey and your basil plant is just a sad memory, you’ll crack open a jar and smell July. It’s like finding a twenty-dollar bill in an old coat. Plus, homemade canned pesto makes you look like a kitchen wizard when you drop it off as a hostess gift. “Oh, this? Just something I put up in August.”

Here’s the big secret, and it’s so simple you’ll laugh: pesto doesn’t want to be shelf-stable with its cheese in it. If you can the classic recipe with Parmigiano, it can go a little funky. So, we cheat. We can the base — basil, garlic, pine nuts, oil, and a squeeze of lemon — and add the cheese later, when you open the jar.

Grab your spoils (and a tiny bit of patience).

You need clean half-pint jars, lids, and bands. And a big pot of water for a water-bath canner. Think of it as a hot tub for your pesto. You’ll also need a good food processor—the one that sounds like a helicopter taking off.

Make your pesto as you normally would: whiz up four cups of packed basil (no stems, please, unless you want a chewy mess), a big handful of pine nuts, four garlic cloves, a big pinch of salt, and the juice of half a lemon. While the motor runs, drizzle in about a cup of good olive oil until it’s a beautiful, thick paste. No cheese! Remember that.

How to Make Pesto Step-By-Step | Food Network

Into the jars they go.

Scoop the pesto into your jars, leaving about a half-inch of space at the top. This is very important — air is the enemy. Wipe the rims clean with a damp paper towel (a fingerprint can ruin your seal). Screw on the lids just finger-tight. Don’t wrestle them.

Lower the jars into the boiling water. They need a full bath for exactly 15 minutes (adjust for altitude if you live in the mountains—check a chart!). When the timer dings, lift them out and set them on a towel on the counter. Then, the most satisfying part: listen for the ping. Each little pop is a sealed success. If a lid doesn’t pop, just put that jar in the fridge and use it within a week. No shame in that game.

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The payoff: a taste of your own genius.

In January, you’ll open a jar. Spoon it into a bowl, stir in a handful of grated Parmigiano, and toss it with pasta. Everyone at the table will sigh, and you’ll look modest. You’ll have bottled a moment when the sun was high and your garden was out of control. That’s the real magic.

And if you forget the cheese and just eat it on toast with a flick of flaky salt? Even better. You’re the boss of your pantry now. Enjoy the pings.