Four Roses Single Barrel Recipe OBSF, OESK, & OESO Bourbon Whiskey Collection

Four Roses Single Barrel Recipe OBSF, OESK, & OESO Bourbon Whiskey Collection is the distillery's 2025 Single Barrel Collection: the three new 2025 releases — OBSF, OESK, and OESO (750mL each) — alongside the flagship OBSV, launched to mark the 20th anniversary of the flagship Single Barrel bourbon. Each is 100 proof (50% ABV), aged 7–9 years — available to order online at Del Mesa Liquor, San Diego, CA.

Four Roses distills ten distinct bourbon recipes from two mash bills × five proprietary yeast strains, and for 20 years only the OBSV recipe was widely available as a Single Barrel (the 2024 World's Best Single Barrel Bourbon at the World Whiskies Awards). For the 20th anniversary in 2025, the distillery finally opened the vault: each year's collection spotlights a different recipe trio. Announced November 2024, in stores early 2025; the 2026 collection rotates to OESF, OESQ, and OBSK, so the 2025 trio is a closed set. This is a national distillery release sold as a bundled 3-pack — not a Del Mesa store pick. Recipe decoding: O = Four Roses distillery, the second letter is the mash bill (B = high-rye 60/35/5, E = low-rye 75/20/5), S = straight whiskey, and the fourth letter is the yeast strain (F = herbal, K = slight spice, O = rich fruit). SRP was $49.99 per bottle.

Tasting notes (official): OBSF (B mash bill + F yeast) — herbal notes, bright rye, apple, vanilla, clove, cocoa; lasting, full-bodied flavor marrying sweetness with mellow spice. OESK (E + K) — baking spices, mellow oak, tea leaves, caramel; rich caramel rounding into a smooth, lasting finish; one of the most sought-after Four Roses recipes. OESO (E + O) — rich red fruit, vanilla, brown sugar, delicate oak; a hint of brown sugar enhancing the richness, producing a soft, long-lasting finish. The side-by-side is, in one retailer's words, "a masterclass in how a single distillery's recipes can diverge so dramatically."

Why buy the 2025 Collection? Because it is the first time all ten Four Roses recipes began opening to the public — a 20th-anniversary milestone — and the 2025 trio is already superseded by the 2026 set, making this a closed, collectible lineup. Browse the Four Roses brand collection, more bourbon whiskey, and spirits gift sets.

Serving note: taste the three side by side, neat — the same distillery, three entirely different whiskeys.

What is in the 2025 Four Roses Single Barrel Collection? Three 750mL bottles — the 2025 releases OBSF, OESK, and OESO — each 100 proof, aged 7–9 years.

What do the recipe codes mean? O = Four Roses distillery; the second letter is the mash bill (B high-rye, E low-rye); S = straight whiskey; the fourth letter is the proprietary yeast strain (F herbal, K spicy, O fruity).

Is this a Del Mesa exclusive? No — it is a national distillery release, sold here as a bundled 3-pack.

Is the 2025 trio still available? The collection rotates annually — 2026's set is OESF, OESQ, and OBSK — so the 2025 trio is a closed set.