Year after year in my new home here in Northern California, I feel myself sinking down roots and developing new traditions. One of them is to cure green olives, which begins for me in early October.
On some crisp autumn Saturday, I will head out into one of the many public parks near my home that someone wisely planted with olive trees a generation ago. Sometimes I go solo, sometimes with friends. When I return, college football is in full swing, and I watch the games as I sort through my haul and prepare the brine.
And after that first season, I’ll eat a handful or two of last year’s olives as a snack while the work is progressing. It’s a quiet little tradition, but it’s grown on me: Cool sunny October days mean gathering green olives and watching a Big 10 football game (I am a Wisconsin graduate).
On one such Saturday, I went out to a public grove I knew would be loaded: Olives are alternate-bearing crops, with one year’s crop thin, the other flush. It should have been a flush year for a Mission olive tree in the park, but it was either picked clean or failed to set. No matter, there were 30 other olive trees to choose from.
Most were rotten with olive fly, whose larvae burrow into olives and leave a beige scar where they entered. Tiny dots on an olive are OK, but that telltale scar means there is a visitor lurking within your olive.
Another hazard are the dry olives. Trees forced to live by their own wits — away from regularly watered grass — are stressed, and their olives shrivel early. Shriveled olives are usable, but they bruise rapidly and don’t make a clean green olive.
I still found several pounds of good green olives that day. Back at home, I set to separating them.
I separated them into small, medium and large olives — I have no idea what variety they are, as I don’t know how to tell the difference. I didn’t have enough large ones to make its own batch, so I mixed them with the mediums. I now had a choice of cures: brine, or lye. Yes, you can cure olives with lye.
The olives you see at the top of this post are cured in brine. This is my preferred method, as it is low-maintenance and results in a super-tangy, salty olive that keeps for more than a year and cries out for beer or ouzo. And I like ouzo. A lot.
Brine-curing is stupid easy, but takes a long time. You make a brine of 1/4 cup kosher salt (Diamond Crystal) to 4 cups water, plus 1/2 cup of vinegar: white wine, cider or simple white vinegar. Submerge the olives in this brine and top with cheesecloth or something else to keep them underwater. Do not cut them.
Cover the top of the container loosely (I use large, 1 gallon glass jars) and put the jar in a dark, cool place. That’s it. Check it from time to time — meaning every week or so at first. The brine should darken, and you might get a scum on the top. That’s OK.
What’s going on is that your olives are fermenting; it is the fermentation that breaks down the oleuropein over time. That’s why I never wash my olives before curing — I want those natural yeasts on the outside of the olive to do their magic.
I change my brine every month or two, when it begins to look extra nasty. I don’t re-rinse the olives, during changes, either, because I want the residue to act as a “starter” to get the next batch of brine going.
Keep in mind you will be in for the long haul: Olives picked in October are typically ready to eat in May or June. It’s a lot like making wine.
Add seasonings after the New Year, otherwise you risk too much spice and not enough olive flavor; this is especially true of chiles. If you find you’ve gone too far, change the brine and don’t add new seasonings, and let it steep for a few weeks. That should calm things down a bit.
For those of you living in olive country, there’s no reason not to gather your own to cure green olives. In most places, they are free for the taking.
And once the olives are finished, there is a certain show-off factor when you pull out a plate of olives you cured yourself. “These are your olives? Wow.” Plus, you can flavor them any way you like, which is a bonus.
For the vast majority of you who don’t live in olive country, you can order fresh olives online, but I can’t personally recommend any companies because I have never used them. If any of you have ordered fresh olives online and can vouch for a company, please let me know.
Incidentally, this method only works to cure green olives. If you want to cure black olives, my method is to oil-cure olives.