It all started in a Louisville basement, with a five-gallon bucket and a question nobody else in the country was asking.
It started with a five-gallon bucket, a basement, and a question nobody else in the country was asking.
Founder Matt Jamie came in with a chef's background and classical French training, which meant he knew food well. Soy sauce was another matter entirely. The fermentation process, the manufacturing side, the business of it all were new territory. But somewhere in the middle of the craft food movement taking hold in the early 2000s, he told a buddy over beer and oysters that he wanted to micro-brew soy sauce, mostly because nobody else in the United States was doing it, and that was enough for him.
He stayed up late researching after his kids went to sleep, downloaded a business plan, and talked to anyone who would listen, including plenty of people who told him it would never work. When that first batch came out of the basement and he tasted it, he knew he'd struck something.
That was the beginning of Bluegrass Soy Sauce.
Why Louisville, and Why Soy Sauce?
On the surface, it's a strange combination. Soy sauce has its roots in China and was refined over centuries in Japan. Louisville is bourbon country. The two don't seem to have much to do with each other.
But the more Matt dug into it, the more he saw the connection.
Bourbon and soy sauce are both fermented. Both start with a mash bill. Both depend on yeast, time, and the right environment to develop their character. And both share something else: limestone-filtered water. The same spring water that distilleries have used for generations to make bourbon is what we use to make Bluegrass Soy Sauce. It's one of the things that makes this part of Kentucky so well-suited for fermentation.
As Matt puts it, it's not just similar in process. It's similar in history and heritage. Japan perfected soy sauce. Kentucky pioneered bourbon. Doing this here wasn't a quirk. It made sense.
The Bourbon Barrel Was the Missing Piece
Even with all the parallels, something still needed to complete the story. It came from an unexpected source.
Mark Bittman, a food writer for the New York Times who had written about soy sauce, told Matt he needed to age the sauce in bourbon barrels. "It completes your story," he said.
He was right.
Used bourbon barrels can only be used once for bourbon. After that, they are repurposed. Bourbon Barrel Foods sources theirs from Woodford Reserve, one of Kentucky's most storied distilleries. When the soy sauce mash ferments inside those charred oak barrels, it picks up something you cannot get any other way. Rich, complex tasting notes reminiscent of fine bourbon. Depth that a standard brewed soy sauce just does not have.
That's what makes Bluegrass Soy Sauce what it is. Not just a soy sauce brewed in Kentucky, but a soy sauce that couldn't have come from anywhere else.
The Process, Done the Right Way
Bourbon Barrel Foods brews Bluegrass Soy Sauce using a traditional Japanese five-ingredient recipe. Non-GMO soybeans grown in Marion County, Kentucky. Soft red winter wheat, also Kentucky-grown. Limestone-filtered spring water from Nelson County. Solar-evaporated sea salt. And an aspergillus oryzae yeast, which kicks off the fermentation.
The soybeans and wheat get inoculated with the yeast to create a mixture called koji. The koji gets combined with the water and salt to form a mash, or moromi, which then goes into the bourbon barrels to ferment and age. When it's ready, it goes into a custom-built press, KenZilla. The name is a nod to Matt's father, Ken, who built the first three presses for the company.
That press separates the solids from the liquid. What comes out is Bluegrass Soy Sauce. It's a slow process. Intentionally so. Time is how soy sauce develops its flavor. We don't rush it.
What Matt Found in Japan
Matt made his first trip to Japan in 2015, nearly ten years after he started brewing in Louisville. He hadn't gone to learn the process. He'd figured that out on his own, out of necessity, with whatever he had. As it turned out, that approach was respected in Japanese brewing culture.
That trip reinforced something Matt had suspected from the beginning. The parallels between the bourbon world and the soy sauce world go beyond process. There's a shared culture of craft, of competition that pushes everyone to be better, of pride in what a particular place and tradition can produce.
What We've Built
Bourbon Barrel Foods has grown considerably since those basement batches. We now operate out of a 30,000-square-foot facility in Louisville's historic Butchertown neighborhood, with 25 employees and an expanded production space that's gone through a full renovation over the years.
Bluegrass Soy Sauce has been featured in the New York Times, Southern Living, Esquire, Garden and Gun, and Food and Wine. It's been on Bizarre Foods America and the Science Channel's How It's Made. Chefs and food experts around the world have taken notice.
But the sauce itself hasn't changed. Same five ingredients. Same process. Same barrels. We've only changed the size of the equipment and the size of the plant. The method stays.
A Soy Sauce That Tells a Story
Bluegrass Soy Sauce isn’t just made in Kentucky. It’s defined by it.
From the limestone water to the bourbon barrels, every part of the process leaves its mark on the final flavor. It’s deep, layered, and impossible to replicate anywhere else. If you’ve never tasted soy sauce like this before, that’s the point.
Bluegrass Soy Sauce is more than a finishing touch. It’s the result of time, place, and a process that refuses to be rushed. Taste it for yourself today.