The Daily Brine / How we make it / Four to Six Months in the Barrel
How We Make It
Four to Six Months in the Barrel
Our sauerkraut is ready when it's ready. That usually takes four to six months.
People are sometimes surprised by that number, so we figured we'd explain why we wait, and what the waiting gets you.
The short version of how we make it
We'll keep this quick. We shred fresh fall cabbage (our shredder gets through about 100 pounds a minute, which is the most exciting thing that happens in our kitchen), mix it with salt, pack it into barrels, cover it with brine, and seal it off from the air. Then we leave it alone. The bacteria already living on the cabbage handle the rest.
How fast kraut used to be made
The big kraut factories of Upstate New York ran on a tighter clock. In 1942, a plant in the Town of Clay fermented its kraut for about three weeks for fresh sale and about six weeks for canning. In Phelps, kraut sat in the vats for about two months before it was drained, cooked on a steam table, and sealed into cans.
That system fed a lot of people cheaply. Cooking and canning also ended the life in the jar, and plenty of kraut on store shelves today is still heat-treated for shelf life.
Ours is raw, unpasteurized, and never cooked. It goes from barrel to jar by hand and ships alive.
What changes over the months
A ferment changes as it goes. Early on, a fast-moving crowd of bacteria gets things started and the cabbage begins to sour. As the acidity climbs, the crowd shifts, and hardier acid-loving bacteria take over and keep working.
With time, the flavor keeps deepening. The sharp, salty edge of a young kraut rounds out into something more complex and savory, and the texture settles into the tender-crisp bite we're after. You can taste the difference between a three-week kraut and a five-month kraut. Once you have, it's hard to go back.
About postbiotics
Here's where the waiting gets interesting beyond flavor.
Most people have heard of probiotics, the live bacteria in fermented foods. Postbiotics are the rest of the story. Scientists are still settling on the details, but in everyday use the word covers what fermenting bacteria leave behind: lactic acid, other organic acids, and a long list of other compounds, along with the bacteria themselves once they're no longer living. In 2021, an international panel of scientists defined a postbiotic as a preparation of non-living microbes or their parts that provides a health benefit.
Research on fermented cabbage specifically is young, but it's moving. A 2025 laboratory study in Applied and Environmental Microbiology compared raw cabbage with sauerkraut and found more than twice as many compounds in the fermented samples, 333 versus 149. In a lab model of the intestinal lining, the fermented cabbage helped protect the barrier from inflammatory damage, while raw cabbage did not. The researchers also found that how long the cabbage fermented changed which compounds showed up.
That was a study in cells, not people, and it's one study, so we won't oversell it. What we can say is this: time changes what's in the jar, and a long ferment gives the cabbage, the salt, and the bacteria room to finish their work.
Why we keep doing it the slow way
Partly because it tastes better. Partly because it's how kraut was made in farmhouse cellars, long before anyone was in a hurry. And partly because we like knowing that when you open a jar, the cabbage inside had a full, unhurried life.
It does mean we plan our barrels months ahead, and our kitchen smells like kraut more or less all the time. We've made our peace with that.
This fall's cabbage is in the barrels now. Until it's ready, the Classic Kraut in our shop has already put in its months.
~Dave & Carly & the F&F Crew
