What Is Single-Barrel Bourbon?

Updated April 2026.

“Single barrel” is marketing English, not a TTB class. One cask is bottled at its own proof. Bourbon still needs mash at least 51% corn, new charred oak, ≥80 proof. Bottled-in-bond is the legal 100-proof class — a different phrase. A 1.5-ounce pour at 46.5% is about 1.16 drinks if that neck prints it. No 2026 ranking or unpublished mash %.

Related: single-barrel bourbon, bottled in bond, cask strength.

Phrase vs class

Language
Single barrel
Bourbon
Bottled in bond
Blanton’s Original

A 750 mL 46.5% bottle is about 20 drinks. Four 93-proof pours are about 4.7 drinks. Pour math: whiskey drinks.

Sources

  • TTB 27 CFR 5.143; 5.88. buffalotracedistillery.com Blanton’s Original: 93 proof / Mash Bill #2 (prior official). Allocated — no street.
  • NIAAA December 2025. Mash % unpublished beyond the bill name.
  • 27 CFR 5.143 still applies
  • Exactly 100 proof + 27 CFR 5.88
  • (27 CFR 5.88)

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