Rhum agricole or molasses rum: what sets them apart

The difference fits in one sentence: rhum agricole is distilled from freshly crushed sugar cane juice, molasses rum from the syrupy residue left over from sugar making. The plant is the same, the raw material is not, and the two families differ in origin, in regulation and in taste.

They do not carry the same weight either. Rhum agricole remains very much a minority: its share is often estimated at around 2% of world production. Almost all the rum produced in the world is molasses rum. Here is what separates them, in concrete terms.

One cane, two raw materials

It all starts with sugar cane, cut and then crushed to extract a sweet juice, known in French as vesou. From there, two paths.

Rhum agricole ferments this juice as it is, much as grape must is fermented. The result is a kind of cane wine, which is then distilled. Fresh juice keeps very poorly and spoils quickly: the distillery therefore has to work with cane cut nearby, and only during the harvest.

Molasses rum, also called sugar-factory rum or industrial rum, goes through the sugar factory first. There the juice is heated and concentrated so that the sugar crystallises. What remains once the crystals have been removed is molasses: a thick, brown liquid, still rich in sugars that will no longer crystallise. Diluted with water, it is fermented, then distilled.

Molasses has one decisive advantage: it can be stored and shipped. It can be distilled all year round, and far from the cane fields. Fresh juice does not travel.

Why rhum agricole was born in the French Caribbean

For a long time, rum was a by-product of sugar: people distilled whatever the sugar factory left behind. In the last quarter of the 19th century, the price of cane sugar collapsed, under the pressure of global overproduction and competition from beet sugar produced in Europe. In Martinique, some distilleries then chose to bypass sugar altogether and distil the cane juice directly.

This is the origin of rhum agricole, and it is why it remains a speciality of the French overseas territories today: Martinique, Guadeloupe and Marie-Galante first and foremost, as well as Réunion, which mainly produces molasses rums and a little rhum agricole. Outside France, the Portuguese island of Madeira has its own tradition of cane juice rum. Brazil also distils fresh cane juice, but the result goes by another name: cachaça, a category in its own right.

Molasses rums come from almost everywhere cane sugar has been made: Jamaica, Barbados, Guyana, Cuba, Puerto Rico and many others. The French Caribbean islands produce them too, alongside their rhums agricoles.

What European regulation says

The word "agricole" is not a free marketing term. Regulation (EU) 2019/787 on spirit drinks reserves it for a rum that meets three conditions:

• it is produced exclusively by distilling fermented sugar cane juice;
• it contains at least 225 g of volatile substances per hectolitre of pure alcohol, that is, aromatic compounds other than ethyl alcohol and methanol;
• it comes under a geographical indication of a French overseas department or of the autonomous region of Madeira.

A cane juice rum produced elsewhere may be remarkable, but it cannot carry the term "rhum agricole" on the European market.

AOC Martinique, the most tightly regulated case

Martinique went further. Since 1996 its rhum agricole has held an appellation d'origine contrôlée (AOC, a protected designation of origin), the only French AOC granted to a rum. Its specification sets out every step:

• the cane comes from the delimited area in Martinique and is cut between 1 January and 31 August;
• only cane juice is used, and fermentation must not exceed 120 hours;
• distillation takes place in a continuous column, and the rum comes off it at between 65 and 75% vol;
• it is sold at a minimum of 40% vol.

The same specification defines the ageing terms:

• blanc (white): at least six weeks of rest in a vat after distillation;
• élevé sous bois (wood-matured): at least twelve months in wood;
• vieux (aged): at least three years in oak containers of less than 650 litres.

This AOC does not say that a rum from Martinique is better than any other. It guarantees an origin and a method, which lets you know exactly what you are buying.

The difference in taste

A rhum agricole, especially a white one, can be recognised by its vegetal notes: freshly cut cane, grass, sometimes floral, fruity or peppery notes. It is often described as livelier and drier. It is the fresh raw material that gives this range: the juice ferments with the aromas of the plant.

A molasses rum starts from a product that has already been heated and concentrated. It tends towards rounder notes: caramel, molasses, dried fruit, pastry. But the family is vast. A light rum distilled to a high strength in industrial columns will be almost neutral, while a Jamaican rum made in a pot still can be extremely aromatic, with notes of very ripe fruit.

So the raw material does not explain everything: fermentation, the type of distillation and ageing matter just as much. But with comparable methods, the gap between fresh juice and molasses is clearly perceptible, and it is the best way in to understanding a rum.

Why our infused rums start from rhum agricole

At LEGBA, our infused rums are not arranged rums: we use an infusion technique we developed ourselves and do not disclose. What interests us here is the base. As we explain on our about page, we start from rhums agricoles chosen for their structure.

The reason follows from everything above. A rum that is too neutral gets wiped out by the fruit, a rum that is too pronounced crushes it. Rhum agricole has a vegetal character and a structure that hold up against an infusion rich in fruit, and that is what keeps the rum in the foreground.

Two examples, both on a base of rhum agricole from Guadeloupe:

• Le Mangomancien, 40% vol: mango leads, supported by papaya and pineapple, while orange and lemon bring freshness.
• Fly to ze graal, 49% vol: roasted buckwheat and wild bilberry, with a roasted, woody finish reminiscent of an aged rum, even though it has never seen a cask.

The whole range is in the LEGBA infused rums collection. What separates an infused rum from an arranged one, we have covered in detail in Arranged rum or infused rum: what really changes. And to compare several bottles with us, we hold private tastings at the greenhouse, in the Jura.

Frequently asked questions

Is rhum agricole always white?
No. It comes as white, wood-matured or aged. The word "agricole" refers to the raw material, cane juice, not to colour or age.

Is molasses rum of lower quality?
No. Some of the most renowned rums in the world are molasses rums. The two families are different, not ranked.

How can you tell whether a rum is agricole?
Read the label. In the European Union, the term "rhum agricole" is reserved for cane juice rums under a geographical indication of a French overseas department or of Madeira. Without this term, it is most often a molasses rum.

Are your infused rums rhums agricoles?
They start from rhums agricoles. But as soon as fruit or plants are infused into them, they leave the "rum" category as defined by the regulation: their legal name is "rum-based spirit drink".

Sales name: rum-based spirit drink. Alcohol abuse is dangerous for your health. Please drink responsibly. Sale to persons under 18 is prohibited.