Updated August 2026.
100% corn is a mash recipe, not a separate bourbon type. Bourbon is one type: ≥51% corn, new charred oak, ≥80 proof. A 100% corn mash is legal if the other rules hold. Distillers rarely publish a full mash bill unpublished percentages. Typical US lots sit at 40% 100 proof is not bottled-in-bond by itself. No official six-bottle ranking or 2026 street list.
Related: types of bourbon, straight bourbon, cheap bourbon.
Mash vs type
| Language | 1.5 oz drinks |
|---|---|
| Bourbon floor | 1.00 at 40% |
| 100% corn | Read the neck |
| Published mash % | — |
| 100 proof | 1.25 |
Count the proof on the neck, not the corn boast. Pour math: whiskey drinks.
Sources
- 27 CFR 5.143 / 5.88. Mash percentages unpublished unless the brand prints them.
- Typical US 40%. NIAAA December 2025. No six-pick ranking. No street.