Four Roses Single Barrel Recipe OBSF Bourbon Whiskey

OBSF is Four Roses' mint-bomb recipe — the high-rye B mashbill with the F yeast's herbal, minty character — released as a 100-proof single barrel for the 2025 Single Barrel Collection. Four Roses is the only distillery running two mashbills and five yeast strains into ten distinct bourbon recipes; the standard Single Barrel is always OBSV, and for years the other nine were gift-shop and private-selection only. In 2025 Four Roses put three of them into wide release at 100 proof, seven to nine years old: OBSF, OESK, and OESO. OBSF is the B mashbill — 60% corn, 35% rye, 5% malted barley — fermented with the F yeast, which the distillery describes as herbal and minty. Bourbon Guy: sweet and floral on the nose with mint and oak, crème brûlée, mint, and cinnamon on the palate, and a finish of lingering spearmint — a mint bomb. The Whiskey Jar's notes agree: the F yeast is unmistakable. Honest note: the most polarizing and most distinctive of the ten recipes — the one Four Roses geeks want in the lineup for exactly that reason, and the one to taste against OESK to understand what yeast does to bourbon. Neat, in a Glencairn, with the OESK and OESO beside it. Four Roses, the mint recipe.

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