Anchored off St Barths, a guest picks up a bottle of 23-year-old rum from the back bar and asks whether it is really older than the 12-year-old Scotch beside it. The honest answer is: possibly not, and here is why. Rum and agave are the two categories where the label tells you the least, and where a stew who actually understands production earns instant credibility.
Rum: Two Decisions That Shape Everything
Decision one — the raw material.
| Base | Result |
|---|---|
| Molasses (the by-product of sugar refining) | The global majority; richer, darker, toffee and dried-fruit notes |
| Fresh cane juice | Grassy, vegetal, funky; the basis of rhum agricole in Martinique and Guadeloupe |
Decision two — the still.
| Still | Result |
|---|---|
| Pot still | Batch, less efficient, keeps congeners; heavy, funky, "hogo" character (Jamaica) |
| Column still | Continuous, highly efficient, strips congeners; light, clean, crisp (Cuba, Puerto Rico, most Spanish-heritage rum) |
Most commercial rums are blends of pot and column distillate.
The Country Styles
- Spanish-heritage (Cuba, Puerto Rico, Dominican Republic, Venezuela) — column-led, lighter, often lightly aged. The Daiquiri and Mojito rum.
- English-heritage (Jamaica, Barbados, Guyana) — more pot still, heavier and more estery. Jamaica for funk, Guyana for the deep Demerara style.
- French-heritage (Martinique, Guadeloupe, Haiti) — cane juice; rhum agricole is grassy and dry. Martinique holds an AOC.
Age Statements: Why They Are Often Unreliable
Rum has no single global regulator. That means:
- An age statement may indicate the youngest rum in the blend (the strict convention), or in some markets the average or even the oldest — the notorious solera number.
- Tropical ageing is fast. Heat and humidity drive far higher angel's share (evaporation) — commonly cited as several times the rate of a Scottish warehouse. A tropically aged 8-year-old can taste older than a 15-year-old Scotch.
- Many rums carry added sugar post-ageing. It is legal in many origins and undeclared. It flattens acidity and can make a rum taste smoother than it is.
Sell rum on taste and style, never on the number.
Agave
| Category | Ageing |
|---|---|
| Blanco / Plata | Unaged or rested under 2 months |
| Reposado | 2–12 months in oak |
| Añejo | 1–3 years in oak (barrels under 600 L) |
| Extra Añejo | Over 3 years |
Two rules that matter at the bar:
- 100% agave vs mixto. If the label does not say 100% de agave, it is a mixto — legally as little as 51% agave sugars, the rest other sugars. Mixto is the source of most bad tequila memories. Carry 100% agave only.
- Mezcal can be made from many agave species (espadín is the workhorse); the piñas are typically roasted in earth pits, which is where the smoke comes from. Smoke is a by-product of the cooking method, not an additive.
Onboard Notes
- Never accept a bottle of añejo tequila for a Margarita just because it costs more — oak fights lime. Blanco or reposado is the correct choice, and say so politely.
- Overproof and cane-juice rums vary hugely in strength; check the ABV before you spec a punch for eight.
- Watch for premium rums being sipped by guests who assume "dark = sweet." Taste with the chief stew before service so you can describe what you are pouring.