Kilner Fermentation Set Review: A Great and Easy Way to Get Started

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There’s a point when I make sauerkraut where it feels like the whole thing is going off the rails. Mine has the traditional cabbage and caraway seeds, but I like to throw an onion in there and something about the latter steers the whole thing into off-putting deep-funk territory at about the six-day mark: it smells vaguely of stinky shoe and has a taste that’s equally prohibitive. Amazingly, these are not bad signs. Instead, they mean that in just a few more days, everything will click into place and I’ll soon be making a late-night snack of bread, cheese, beer, and sauerkraut that leaves me giddy.

Turns out that many fermented foods have this happy effect on me. So much so that while it took two decades of adulthood before I started making them myself, they’re now a part of my repertoire. Most of the time, I have a jar of sauerkraut or even kimchi fermenting away on a cool shelf, and another ready to eat in the fridge.

I like fermenting for a few reasons: the meditative chopping of a pile of vegetables, tasting the food as it evolves, and the day it hits that “holy cow” level of goodness when I slide it into the fridge for storage. I also love that the lowly cabbage—the unlikely star of the fermented world—can be transformed into something so exciting. If you’re in it for more than just great flavor, there are also a host of purported health benefits you may wish to explore.

Yet there are obstacles to making fermented food that you don’t usually run into with cooking, mostly because fermenting is a weird blend between steering the ship and not knowing exactly where it’ll end up.

First, fermentation is essentially controlling bacteria—keeping bad ones at bay while creating an atmosphere where good ones thrive and help create flavors that we love. This can be intimidating.

Second, you need salt to make it happen, but knowing how much of which kind of salt can feel like you need a degree in the dark arts to get it right.

Third, it’s clunky. You’ve gotta rig up a system to keep the vegetables submerged in the brine, usually with some sort of weight. One type of kit you can buy uses what looks like a spring from jack in the box to keep everything under the surface. Some people use washed stones or a plate or a Ziploc bag full of brine on top of everything and cover the jar with muslin. For my sauerkraut, I’d been putting the cabbage in a large, wide-mouth jar, and weighed it down with a smaller jar with a heavy pestle inside it. I also learned to put everything on a tray in case the brine overflowed.

You eventually figure out the salt and grow accustomed to the lack of control, but the clunkiness is just an impediment. As someone who may have been a herding dog in another life, I like the thought of getting a few more people into the fermentation game, and one way to do that is to simplify the entry requirements by making the setup a little less cobbled-together feeling.

You can speed it up a bit, spend big, and get a large ceramic crock that has weights to hold the food down and a U-shaped lip on the rim that you fill with water. This is what you find set out on urban balconies and countryside porches all over South Korea.

Right now, though, I’m really enjoying Kilner’s Fermentation Set—a three-liter jar (big but not huge), with a pair of glazed ceramic half moons that easily slip inside the mouth of the jar to weigh everything down, and a lid with an air lock, a simple one-way valve that keeps unwanted guests out and allows the whole thing to gurgle away without building pressure in the jar.

The Kilner setup certainly has a bit of a “home science kit” look to it with that air lock up top, but it costs a very affordable $30 and it’s simple—you can figure out how it works just by looking at the picture on the box. From there, chop and salt the cabbage, add it to the jar, set on the weights, pop on the lid and set it somewhere cool. Unlike a crock, the jar’s clear glass sidewalls allow you to keep an eye on things, which is particularly helpful when you’re making sure everything stays submerged or watching for unwanted mold growth. In the early stages of your fermentation career, the less guesswork the better.

Having become used to the clunkiness of fermenting, suddenly having a nice setup had some pleasant effects, most notably that everything went faster. There are similar setups out there, but this one is particularly refined.

It also freed me up enough to spread my wings more than I’d done in the past. Since refrigeration essentially hits the brakes on fermentation, once I made sauerkraut and got it where I wanted it, I transferred it into a couple Ball jars, put them in the fridge, then turned right around and started some kimchi. When the kimchi was done, I started my first-ever batch of sour pickles, riffing off a recipe for “nuclear” pickles from Ukraine.

When my mom came out for a visit, we took inspiration from fermentation guru Sandor Katz and made a big batch of sauerkraut that was half cabbage and half all sorts of other vegetables like boy choy, zucchini, garlic scapes, and radishes. An accomplished home cook, mom had never made sauerkraut and took to it quickly. She salted the shredded cabbage and started kneading it with her hands to help the salt pull out the moisture and create the brine.

“I’m not used to tactile-ing the cabbage so much,” she said crushing it between her fingers and working out some frustrations with our current political climate at the same time. Then she started layering the vegetables into the jar, taking the time to make it look nice.

“It helps, doesn’t it?” she asked. It did! We celebrated by tasting a sour pickle.

Having these foods around (and looking good!) means you’re likely to eat more of them, then crave more, then make more, a perpetually slow-bubbling virtuous cycle of fermented happiness. I’m now in the habit of bringing jars to friends, breaking them out at barbecues, or having a bit as an easy side dish at dinner.

One thing worth kvetching about is that I wish a storage lid was part of the kit. Another quibble is the choice of a wooden lid—which some experts appreciate, but also could harbor unwelcome bacteria that can ruin a batch. This is something that divides the fermentation crowd; Sandor Katz mentions the use of a hardwood as a crock weight option in Wild Fermentation, but other people have been scarred by the process. I had no problems with Kilner’s lid in my testing, and some pros use wooden parts in their fermenting, but it’s something I’ll be keeping an eye on in the future. Kilner is in the process of phasing out the wooden lid and a spokesperson said it was being replaced by a silicone lid late this summer.

In Wild Fermentation, Katz says, “clever people accomplish this simple process [of fermentation] in many different ways. No single vessel is best.” You can certainly rig up your own fermentation setup or pay a bunch for a crock. But for a fermenting novice like me, Kilner’s kit is well worth the investment.

Kilner’s Fermentation Set isn’t reinventing the wheel—there have been versions of something like this for centuries—but this one is relatively inexpensive, well thought out, and it does two things that all great products should: it made my life easier and encouraged me to make more.

Food writer Joe Ray (@joe_diner) is a Lowell Thomas Travel Journalist of The Year, a restaurant critic, and author of “Sea and Smoke” with chef Blaine Wetzel.