Founders Brewing Crosses Into Bourbon Country With Its First-Ever KBS Bourbon
For more than two decades, Founders Brewing Co. has occupied a rare space in American craft beer — a brewery whose most celebrated release isn't just beloved, it's genuinely transformative. Kentucky Breakfast Stout, known universally as KBS, changed how an entire generation of beer drinkers understood what a barrel could do to a beverage. Now, the Grand Rapids, Michigan brewery has turned that relationship on its head entirely. Founders Brewing Co. is making its first venture into the spirit business, releasing a limited-edition KBS Bourbon. This isn't a casual brand extension or a licensing deal with some contract distillery looking for shelf presence. It is, by Founders' own framing, the logical next chapter in a story that started more than twenty years ago in a cave in Michigan.
What Is KBS Bourbon, Exactly?
The concept is elegantly circular. The original KBS beer went into bourbon barrels to pick up vanilla, oak, and whiskey character. Now, a small-batch Kentucky bourbon has gone into the barrels that once held KBS — essentially reversing the transaction and closing a loop that began in 2003. Distilled with care, aged in American oak, and finished in barrels that once held their legendary stout, KBS Bourbon reflects the same dedication to depth, balance, and craftsmanship that defines the brewery's most iconic beers.
The result, at least on paper, is something that should appeal equally to the bourbon collector who's always been curious about the KBS hype and the longtime KBS fan who has wanted to drink those flavors in a spirit format. Founders said KBS Bourbon was aged in American oak and finished in barrels that once held KBS, bringing a smooth, rich bourbon with notes of vanilla, oak, chocolate and roasted coffee. It comes in at 97 proof. That proof point — just shy of 100 — suggests something with genuine weight and backbone without veering into the territory of cask-strength novelty. It's a considered number, one that implies the whiskey is meant to be sipped and assessed rather than splashed into a cocktail.
The tasting profile lines up closely with what KBS drinkers already know and love. Each sip opens with warm vanilla and oak, followed by subtle roasted nuances and a smooth, lingering finish. For bourbon enthusiasts who have never tried the beer, that flavor architecture — vanilla, oak up front, chocolate and coffee on the back end — maps cleanly onto the kind of well-finished, layered bourbon that serious collectors seek out. The KBS barrel finish isn't delivering exotic or unfamiliar territory; it's amplifying and shaping the flavors that American oak already coaxes from whiskey grain, while adding a distinct roasted, coffee-forward complexity that pure bourbon barrels can't replicate on their own.
The Origins of KBS: From Experimental Stout to Cultural Phenomenon
A Beer That Rewired Drinkers' Palates
This small-batch Kentucky bourbon is a new chapter in a story that began back in 2003, when Founders first introduced KBS to the world. What started as an experimental barrel-aged stout quickly became one of the brewery's most iconic beers. That origin story matters here because it provides the context for why this bourbon release carries genuine weight beyond typical craft brewery brand extension plays.
When KBS arrived on the scene, bourbon barrel-aged beer was still niche, even within the already-niche world of craft beer. At the time, bourbon barrel-aged beer was still unfamiliar to many drinkers. People knew they loved the rich chocolate, coffee, vanilla and oak character of KBS, even if they did not yet know they loved bourbon barrel-aged stouts. That's a subtle but important distinction. KBS functioned as a gateway — it introduced a generation of drinkers to the flavors of bourbon aging without requiring them to sit down with a glass of whiskey. The beer did the heavy lifting of education, and the palates it shaped over the following two decades are exactly the palates that will now reach for KBS Bourbon.
Building a Brand Around the Barrel
Beers like KBS, CBS, Backwoods Bastard, Dirty Bastard, Centennial IPA, and All Day IPA became category-defining releases, earning Founders a loyal following and countless awards. KBS, in particular, became a cultural phenomenon — a bourbon barrel-aged stout that introduced thousands of drinkers to the world of barrel-aged beer and set a new standard for richness, complexity, and craftsmanship.
For Founders, the barrel has never been a finishing touch. It has been the centerpiece. Founders' commitment to barrel aging, flavor exploration, and meticulous brewing technique has positioned the brewery as a leader in both innovation and tradition. Their Barrel-Aged Series, seasonal releases, and year-round favorites continue to influence brewers across the country. A brewery that has spent two-plus decades thinking about what bourbon barrels do to beer has, in a sense, been doing barrel-aging research this entire time. The institutional knowledge embedded in that program — understanding how stave char, previous bourbon residue, and wood porosity interact with liquid over extended time — is real expertise that doesn't simply evaporate when the liquid inside the barrel changes from stout to whiskey.
The Founders-Bardstown Precedent: How a 2022 Collaboration Planted the Seeds
To understand why Founders is now producing its own bourbon rather than just finishing beer in bourbon barrels, it helps to look at what happened four years ago. Founders previously collaborated with Bardstown Bourbon Company, taking the Bardstown bourbon and finishing it in KBS barrels. That partnership gave Founders its first real look at what those barrels could do in reverse — what kind of whiskey character emerged when bourbon went into wood that had already been soaked through with KBS's chocolate, coffee, and roasted grain character.
The Bardstown collaboration was a serious project, not a novelty release. According to Bardstown, the 10-year aged Tennessee bourbon is 84% corn, 8% rye and 8% malted barley. It was finished for 15 months in the KBS barrels — a long, deliberate finish that went well beyond a quick cosmetic treatment. Bardstown said the bourbon is "rich and complex" with tasting notes of cocoa, orange peel and roasted malt with dark chocolate, hazelnut and black cherry. Coming in at 110 proof, it was a bold spirit with serious presence on the palate.
What Dan Callaway Saw in Those Barrels
The logistics of the Bardstown collaboration revealed something important about the timing and precision required to make a KBS barrel finish work well. "The robust profile is a direct result of the care and coordination in shipping these flavorful barrels. The day they are emptied in Grand Rapids, they are filled with bourbon in Bardstown. The rich waves of chocolate malt from KBS carry through the entire aging process and balance beautifully with classic bourbon," said Dan Callaway, the VP of Product Development and Master Blender at Bardstown. That kind of tight coordination — bourbon going into wood the same day the stout comes out — minimizes oxidation and preserves the residual character that makes the finish meaningful. It's the kind of logistical discipline that separates a serious program from a marketing stunt.
Critical reception of the Bardstown collaboration was instructive, too. Reviewers at Breaking Bourbon found it to be "an exceptionally well-integrated marriage of whiskey and beer barrel finishing," though they noted that the whiskey never quite reaches the intensity you might expect for 110 proof. The integration was the point, and it worked. For Founders, watching a partner distillery succeed with their barrels while the beer brand provided the key ingredient almost certainly sparked the question: why not own the whole process?
Founders Goes Solo: The Decision to Enter Spirits Directly
The move from collaborative participant to independent spirits producer is not a trivial one. It requires different licensing, different expertise, and a different kind of market positioning than anything Founders has done before. The introduction of KBS Bourbon marks a major milestone in the brewery's evolution — a natural extension of the legacy that began with the original KBS in 2003. By entering the world of spirits, Founders is expanding its creative reach while honoring the barrels, flavors, and traditions that shaped its identity.
Crain's Detroit Business, which has covered Founders closely since the brewery's early days in Grand Rapids, framed the release as a deliberate test of market demand. Founders Brewing is stepping into spirits with the limited release of KBS Bourbon, a single barrel Kentucky bourbon aged in KBS barrels. The "single barrel" description and the deliberately limited production run signal that this is an intentional toe-dip rather than an all-in plunge. Founders is watching to see how the market responds before committing to a larger spirits program. That's a smart approach from a brewery that has built its reputation on calculated risk-taking rather than overproduction.
Father's Day at the Taproom: Marking the Moment
The timing of the release and the way Founders chose to introduce it to the public says something about who they believe their core customer is. To celebrate the release, Founders offered complimentary neat pours of KBS Bourbon during Father's Day at the Founders taproom — the perfect opportunity to experience this very limited release and raise a glass to the father figures who helped shape them. Father's Day is one of the year's biggest selling occasions for premium bourbon. Positioning a neat pour of a debut limited-release whiskey as the drink of that moment is a savvy piece of brand storytelling. It ties the spirit to ritual, to occasion, to shared experience — all things that the whiskey category trades on heavily.
Where to Get It — and Why That's the Hard Part
Availability is, predictably, the main obstacle for anyone outside Michigan who reads this and immediately wants to track down a bottle. KBS Bourbon is available in very limited quantities at Founders' company store, with select availability at retailers across Michigan. There is no indication, at this stage, that the release will move beyond the state's borders in any significant way. For enthusiasts outside of Michigan, this is either a reason to plan a trip to Grand Rapids or to watch the secondary market carefully — where, given KBS's track record, a 97-proof single-barrel limited release will almost certainly command premiums well above the retail price.
The scarcity is real, and it's structural. This isn't an artificial limitation designed to generate hype; it's the natural consequence of a small-batch, single-barrel program that Founders is approaching as a test rather than a full commercial launch. The barrels that held KBS are not infinite in number. Each batch of beer empties a finite number of barrels, and the window for filling those barrels with bourbon whiskey before too much of the residual character dissipates is narrow. That physical constraint means KBS Bourbon will never be a product you pull off a supermarket shelf in bulk.
The Flavor Logic: Why the Circle Makes Sense
Bourbon Into Beer, Beer Back Into Bourbon
The cyclical nature of this release — bourbon barrels make KBS, KBS barrels finish bourbon — is not just a clever narrative device. It reflects something genuine about how flavor compounds migrate through wood over time. When KBS ages in a bourbon barrel for a year, this big, bold imperial stout brewed with premium chocolate and coffee takes on powerful notes of vanilla, cocoa, and charred oak from the barrel. But the barrel takes something back, too. The stout's chocolate malt oils, coffee compounds, and residual sugars penetrate the wood's pores and become part of the barrel's character. When a whiskey goes into that barrel next, it picks up not just the original bourbon residue from the first use but this entirely new layer of roasted, chocolate-forward character that only KBS could have deposited there.
The result is a flavor profile unlike anything a standard double-barrel or wine-finish bourbon can achieve. Vanilla and oak are the baseline — the American oak foundation that any well-aged bourbon delivers. But the roasted coffee and chocolate notes that KBS Bourbon carries are not the product of a grain bill or a yeast strain. They come from the wood itself, from two years of KBS aging that happened inside that barrel before the whiskey ever arrived. That's a genuinely unique finishing mechanism, and it's one that Founders — with their deep institutional knowledge of how those barrels behave — is better positioned to execute than any outside partner could be.
Proof Point and Palatability
The choice to bottle at 97 proof rather than cask strength also deserves examination. The Bardstown collaboration came in at 110 proof, and while reviewers appreciated the integration, some noted that the whiskey's restrained intensity at that proof point was unexpected. At 97 proof, KBS Bourbon sits squarely in a drinkable, approachable range that doesn't require dilution to enjoy but still carries enough ethanol to deliver the heat and texture that whiskey drinkers expect. It's a proof that respects both the spirit and the drinker — high enough to be taken seriously by enthusiasts, accessible enough to welcome the KBS beer fan who is new to sipping whiskey neat.
Craft Breweries and the Spirits Crossover: A Broader Industry Trend
Founders is not the first craft brewery to eye the spirits shelf with ambition, but the KBS Bourbon represents something more grounded than many brewery-to-distillery pivots. Plenty of breweries have launched spirits lines as diversification plays — gin made with hop botanicals, vodka for revenue padding, whiskey for prestige. Most of those efforts feel like category tourism. Founders' move is different because the product's identity is entirely built on an asset the brewery already owns: those KBS barrels and the flavor signature burned into their wood. There's no pretense here of building a distillery from scratch and competing with Kentucky on Kentucky's terms. This is a brewery doing something only it can do, with ingredients — barrels — that are uniquely its own.
Founders Brewing Co., based in Grand Rapids, Michigan, stands as one of the most influential and widely recognized craft breweries in the United States. Since its founding in 1997, Founders has built a reputation for brewing bold, complex, flavor-driven beers that helped shape modern American craft beer. That credibility, built over nearly thirty years of releasing beers that demanded attention, is the foundation on which KBS Bourbon rests. When Founders introduces a limited whiskey, it arrives with an audience already predisposed to take it seriously.
What This Means for Enthusiasts — Beer Fans and Bourbon Collectors Alike
For the bourbon collector, KBS Bourbon presents a genuinely novel proposition. The market is flooded with finished bourbons — wine cask finishes, rum barrel finishes, port pipe finishes — many of which feel interchangeable in their execution. A finish in barrels that spent a year holding one of America's most celebrated barrel-aged stouts is a different kind of story. The provenance is traceable. The flavor logic is sound. And the producer behind the release has decades of barrel-aging expertise that most beverage alcohol companies can't claim.
For the KBS faithful — the people who set alarm clocks for the annual release, who drive hours to pick up cases from trusted retailers, who have opinions about which vintage was the best — this bourbon is the most direct expression yet of what KBS is, stripped of the malt, hops, water, and carbonation. What's left, transferred into whiskey through the medium of wood, is the essential character of those barrels: the roasted depth, the chocolate richness, the vanilla warmth. KBS Bourbon is, in that sense, the beer's shadow in spirit form.
Whether Founders expands this program into an annual release, a larger production run, or a full spirits line will depend on how the market responds to this initial, tightly controlled launch. The beer industry is watching. The bourbon industry is watching. And given the name on the bottle and the barrels behind it, there are a lot of people in both camps who will be eager to find out if a pint of KBS and a glass of KBS Bourbon taste like two halves of the same conversation — just in very different glasses.
