Distillery: Four Roses Bourbon – Lawrenceburg, Kentucky
Proof: 100 (50% ABV)
Age: Seven to Nine Years
Mashbill: 75% Corn, 20% Rye, 5% Malted Barley
MSRP: $50
Who They Are
When it comes to Four Roses Bourbon, one recipe is the OG expression of the distillery’s unique ten-recipe system: OBSV. Known for its high rye mashbill and delicate fruity yeast strain, OBSV is the recipe featured in Four Roses’ standard Single Barrel bottling. However, each barrel is distinct, offering enthusiasts the chance to explore a classic bourbon with subtle differences in flavor and character.
The “O” in OBSV signifies the Four Roses mashbill, featuring 60% corn, 35% rye, and 5% malted barley—a high-rye content that promises spice and complexity. The “B” mashbill delivers bold flavors, while the “V” yeast strain emphasizes delicate fruitiness. Bottled at barrel strength and aged for 8–10 years, OBSV delivers a balanced, nuanced experience that appeals to both seasoned bourbon lovers and newcomers alike.
Aged for 7-9 years and bottled at 100 proof, OBSV presents a sophisticated interpretation of Four Roses’ masterful distilling approach.
Four Roses Single Barrel OBSV Review: Tasting Notes

Nose – 4/5
The Nose on OBSV is a masterful balance of bright fruit and warm spice. Aromas of fresh peaches, ripe cherries, and warm vanilla complement the caramel undertones. There’s a slight herbal undertone of fresh mint or dill that adds complexity.
Palate – 4/5
The Palate is where OBSV always seems to shine. The high rye mashbill asserts itself with a peppery spice that quickly mellows into layers of sweetness. Rich flavors of honey, citrus and the goodness of baked cinnamon apples. Mid-Palate is dark chocolate and roasted almond notes. The mouthfeel is velvety smooth which helps the flavors linger artfully.
Finish – 4/5
The Finish is long and satisfying, with a gentle warmth that gradually builds. Notes of toasted oak and black pepper give way to a touch of dried raisins before fading into caramel and citrus zest.
Value – 4/5
With a $50 MSRP, Four Roses Single Barrel OBSV always provides exceptional value for a barrel-proof bourbon. Four Roses Single Barrel OBSV encapsulates everything we, as enthusiasts, love about this brand: consistency, balance, complexity, and a focus on unique flavor profiles.
Four Roses Single Barrel OBSV: The Verdict
Verdict – 4/5
We score each bourbon based on nose, palate, finish, and value.
Scoring System:
- Platinum – 4.5 – 5
- Gold – 4 – 4.5
- Silver – 3 – 4
- Bronze – <3
Mike Long is a staff writer at Bourbon Inspector and has an Executive Bourbon Steward designation from the Stave and Thief Society. He’s a former “wine guy” who discovered his love for bourbon years back at a spur-of-the-moment bourbon tasting he attended. He also loves traveling throughout America with his wife of over 37 years, Debby.