Buffalo Trace Single Oak Project

The Buffalo Trace Single Oak Project is the most comprehensive bourbon experiment ever conducted, designed to test seven specific production variables across 192 unique barrels made from 96 individually-grown American oak trees, each bottled in 375ml half-bottles to make the full experiment financially accessible to participating consumers. Initiated by Buffalo Trace Distillery (DSP-KY-113) in 1999, the project released its 192 unique single-barrel bourbons to the public in quarterly waves from 2011 through 2015. Consumers were invited to rate each release online, and after 5,086 whiskey reviews were submitted by participants, Buffalo Trace announced Barrel #80 as the winning bourbon on June 18, 2015. In April 2026, Buffalo Trace officially launched the permanent commercial release of the winning formula, built to Barrel #80's exact specifications.

The Single Oak Project experiment began in 1999 when Buffalo Trace first selected the 96 American oak trees and began the stave-seasoning and cooperage process. The 192 unique barrels were aged through the 2000s, with public bottling starting in 2011. The first 12 of the 192 bottles hit select retail stores in 2011. Buffalo Trace released the remaining 180 bottles in 12-bottle quarterly waves through February 2015. The complete 192-bottle release schedule spanned 16 quarters (4 years).

The Single Oak Project comprises exactly 192 unique single-barrel bourbon releases. The number is derived from Buffalo Trace's source-material strategy: 96 American oak trees were selected, each tree was cut into two halves (top half and bottom half), and one barrel was constructed from each unique tree section's staves — yielding 192 total tree-section-to-barrel pairings. Every one of the 192 bottles is individually numbered and traceable to its specific source tree section.

The Single Oak Project measured seven specific production variables across the 192 barrels:

• Recipe — Wheat mash bill or rye mash bill

• Entry proof — 105 proof or 125 proof (the proof at which the new-make spirit entered the barrel)

• Stave seasoning — Six months or twelve months of air-drying before the staves were coopered into barrels

• Wood grain size — Tight grain, average grain, or coarse grain

• Warehouse floor type — Concrete floor or wooden rick floor

• Barrel char level — #3 char or #4 char

• Tree cut — Top half of the source tree or bottom half of the source tree

Each of the 192 barrels reflected a unique combination of these seven variables, making the project the most controlled multi-variable experiment in bourbon history.

Barrel #80 won the Single Oak Project, as announced by Buffalo Trace Distillery on June 18, 2015. Barrel #80 received the highest overall rating from the 5,086 whiskey reviews submitted by participants at SingleOakProject.com throughout the 2011-2015 release period. Barrel #80's specifications:

• Mash bill: Rye

• Entry proof: 125 proof

• Stave seasoning: 12 months

• Wood grain: Average grain

• Warehouse floor: Concrete floor warehouse

• Barrel char: #4 char

• Tree cut: Bottom half of source tree

These specifications now serve as the basis for the permanent Single Oak commercial release that Buffalo Trace launched in April 2026.

Buffalo Trace released the 192 Single Oak Project bottles in quarterly waves of 12 bottles each, starting in 2011 and concluding in February 2015 — sixteen quarterly releases over four years. Each bottle was a 375ml half-bottle (the half-size format was a deliberate choice to make the complete 192-bottle experiment financially accessible to participating consumers). Each release was accompanied by a tasting card identifying that specific bottle's combination of all seven variables, allowing consumers to record their tasting notes and submit ratings online at SingleOakProject.com. Bottles were distributed through Buffalo Trace's national allocation network at suggested retail prices around $55 per 375ml bottle at original retail.

Buffalo Trace selected the 96 source trees from controlled American oak forest plots, classifying each tree according to two key variables: (a) growth-ring density per inch — which Buffalo Trace categorized as tight, average, or coarse grain — and (b) growing location. The trees were selected to provide a representative sample of American white oak variation. Each selected tree was then cut into two halves — top half and bottom half — to test whether the position of the wood within the tree affected the resulting bourbon flavor profile. The total selection process from forest plot to barrel construction took several years prior to barrel filling in the late 1990s.

Both are Buffalo Trace's experimental bourbon programs, but they differ in scope and methodology. The Buffalo Trace Experimental Collection (launched 2006) is an ongoing series of individual experimental releases — each addressing a different specific question (e.g., the 1995 Heavy Char Twice Barrel, the Old Charter Oak releases, the recent Low Entry Proof Wheated Bourbon) — and there is no fixed end date to the program. The Single Oak Project was a finite, comprehensive multi-variable experiment with a defined start (1999) and end (2015 winner announcement), specifically designed to isolate seven variables across 192 barrels. The Single Oak Project is the most rigorous controlled experiment Buffalo Trace has ever conducted, while the Experimental Collection is the distillery's ongoing platform for one-off experimental releases.

Buffalo Trace has described Barrel #80 — the consumer-crowned Single Oak Project winner — as a balanced, rich, deeply integrated rye-recipe bourbon with significant influence from the 125 entry proof, the 12-month stave seasoning, and the #4 barrel char. Tasting notes from professional reviewers consistently identify caramel, vanilla, baking spice (cinnamon and clove), dark cherry, toffee, and a long oak-and-rye-spice finish. The 12-month seasoned staves and #4 char combination contribute pronounced caramelized sugar and toasted oak notes, while the average-grain wood from the bottom half of the source tree contributes structured tannin and balanced flavor extraction. Barrel #80 was the highest-rated of all 192 Single Oak Project releases — making it, by consumer consensus, one of the most beloved single-variable bourbon expressions ever crowned.

In April 2026, Buffalo Trace officially launched the permanent commercial release of the Single Oak Project, transitioning it from a finite 192-bottle experiment into a permanent member of the Buffalo Trace portfolio. The permanent release is produced to match the verified specifications of the winning Barrel #80: rye mash bill, 125 entry proof, 12-month stave seasoning, average-grain wood, concrete-floor warehouse aging, #4 char barrels, and staves cut from the bottom half of the source tree. Producing the permanent release required Buffalo Trace to harvest new American oak in the mid-2010s, dry the staves for 12 months, age the resulting bourbon for eight years, and finally bottle the result in 2026 — meaning the permanent commercial release replicates Barrel #80's exact production blueprint and approximates its aging profile. The brand became available through Sazerac's national distributor network and the Buffalo Trace Distillery Gift Shop starting April 2026 — making the winning specifications accessible to bourbon drinkers for the first time outside the original 192-bottle 2011-2015 release series.

The Single Oak Project is widely regarded as the single most important controlled bourbon experiment in modern American whiskey history for three reasons. First, methodological rigor — no other bourbon experiment has ever controlled for seven variables simultaneously across 192 unique barrels with traceable tree-section provenance. Second, consumer participation — the 5,086 whiskey reviews submitted at SingleOakProject.com made it the largest direct-consumer bourbon evaluation ever conducted, and the resulting Barrel #80 winner reflects a genuine consensus rather than a single critic's judgment. Third, commercial impact — the project's findings have informed Buffalo Trace's barrel-selection and aging methodology for the past decade and have now become the basis for a permanent commercial release, validating the experimental approach with a lasting product. Jim Murray's Whisky Bible 2016 declared the Single Oak Project "by far the most important commercially undertaken in whisk(e)y history," noting that picking out the differences across the 192 barrels was "almost certainly the most fascinating project of a career covering a quarter of a century." The Single Oak Project has fundamentally changed how the bourbon industry thinks about variable-isolation in whiskey production.

Original Single Oak Project bottles (2011-2015 releases) had an MSRP of approximately $55 per 375ml half-bottle at original retail. Secondary-market prices today vary significantly by specific barrel number and variable combination:

• Most Single Oak Project bottles (375ml) — $300-$800 on the secondary market

• Higher-rated Single Oak Project bottles (those near the top of the 5,086-review consumer rating pool) — $800-$2,000+

• 2026 Permanent Single Oak Commercial Release (Barrel #80 specifications) — first commercial release April 2026 through Sazerac's national distributor network and the Buffalo Trace Distillery Gift Shop