Rum and Coke
Two ingredients, no technique, and one of the most ordered drinks on earth. Rum and Coke has no documented inventor and no published specification — it appeared wherever American cola met Caribbean rum, most plausibly in Cuba after 1900, and it has been poured by eye ever since. It is also not a Cuba Libre, whatever a menu tells you. The Cuba Libre is this drink plus lime, and that squeeze is not a garnish: it cuts the cola's sweetness and changes the whole balance. Order one in Havana and you get lime; order the other and you do not. What a two-ingredient drink exposes is quality. There is nothing to hide a harsh rum behind and nothing to disguise a flat, oversweet cola, which is why the difference between a careless one and a considered one is larger here than in almost anything with five ingredients in it.
Variations
Glassware: Highball Glass
Garnish:
Ingredients
50ml
Any style, and each makes a different drink: white is lightest, gold and aged meet the cola’s caramel, spiced shares its register directly. There are two ingredients here, so a rough rum has nowhere at all to hide.
150ml
Three quarters of the glass and full sugar, not diet — the sweetness is structural and artificial sweeteners leave the drink hollow. Open it fresh, because flat cola is the most common fault in a drink this simple.
Instructions
Fill a highball glass to the top with cubed ice.
Pour the rum over the ice.
Top with well-chilled cola, poured gently down the inside of the glass.
Stir once, gently, and serve immediately.
Our version
A Rum and Coke has no documented inventor and no published specification to check against — it is two ingredients whose origin is lost. This is our own build: one part rum to three of cola, poured over a full glass of ice. The Expedition Serve below is the version the IWSC judged, using Expedition Spiced Rum with Franklin & Sons 1886 Original Cola.
Source: our own specification. Last checked 14 August 2026.
Expert Tip
Pack the glass with ice rather than half-filling it. A full glass of ice keeps the drink cold and dilutes slowly; a half-filled one warms within minutes and then waters the drink down fast. It feels counterintuitive and it is the single biggest improvement available here. Chill the cola properly before it goes anywhere near the glass. Ice cannot do two jobs at once, and cola taken from a cupboard will spend all of it cooling the drink rather than keeping it cold. Pour the cola down the side of the glass rather than straight in, and stir once. Every extra stir costs carbonation, and the bubbles are doing real work: they carry the aroma of the rum and keep a sweet drink from reading as heavy.
Flavour Profile
It Is Not a Cuba Libre
The two names get used interchangeably on menus and they describe different drinks.
A Cuba Libre is rum, cola and fresh lime, and the lime is structural rather than decorative: cola is sweet and low in acid, and the squeeze gives the drink an edge it otherwise lacks. Take it out and you have a Rum and Coke — softer, sweeter, more straightforwardly refreshing, and a genuinely different proposition rather than the same drink undressed.
The Cuba Libre also carries a story the Rum and Coke does not, dating to American soldiers in Cuba around 1900 and the toast the drink is named for. Nobody has ever bothered to mythologise a Rum and Coke, which is part of its appeal.
The Ratio
One part rum to three of cola is the sensible default and almost nobody measures it.
At 50ml of rum to 150ml of cola the spirit is clearly present and the drink stays long enough to last. Push to 1:2 and it becomes a considerably more serious drink than it tastes — the cola hides alcohol extremely well, which is exactly why the combination has the reputation it has. Stretch to 1:4 and the rum turns into a suggestion.
The better rum you use, the shorter you should pour it. A rum worth tasting is wasted at 1:4, and a rough one needs the cover.
The Rum Decides It
Every style makes a recognisably different drink, and none of them is wrong.
White rum is the default and the lightest: clean, sweet, and largely a delivery mechanism for the cola. Gold and aged rums bring vanilla and oak that meet the cola's caramel directly, which makes a rounder and more coherent drink. Spiced rum is the natural partner — cola is already a spiced drink, built on cinnamon, citrus and vanilla, so the two share a register and reinforce each other. A dark Jamaican rum turns it funky and divisive in a way worth trying once.
This is the cheapest experiment in cocktails: same mixer, four bottles, four genuinely different results.
The Cola Is Half the Drink
It is three quarters of the volume and it gets a fraction of the thought.
Full sugar rather than diet: the sweetness is structural, and artificial sweeteners leave a drink that tastes hollow under the rum rather than balanced. Open it fresh, because flat cola is the single most common fault in a drink with nowhere to hide. And a cola with genuine botanical bitterness behind the sugar — the spiced, small-producer sort — gives the rum something to push against in a way the mass-market versions do not.
Cold matters more than ice does. Warm cola over ice dilutes to nothing within a minute; cold cola over a full glass of ice holds.
The Spirit
RumA spirit distilled from sugarcane, either from molasses or from fresh-pressed juice. The styles differ by what happened after distillation: how long in cask, what was added, and at what strength it was bottled.
Frequently Asked Questions
What is the difference between a Rum and Coke and a Cuba Libre?
Lime. A Cuba Libre is rum, cola and fresh lime juice; a Rum and Coke is the same drink without it. The squeeze is structural rather than decorative — cola is sweet and low in acid, and the lime gives the drink an edge it otherwise lacks.
What is the best ratio for a Rum and Coke?
One part rum to three parts cola — around 50ml to 150ml — is the sensible default. At 1:2 it becomes considerably stronger than it tastes, because cola hides alcohol well. At 1:4 the rum stops being audible.
Which rum is best with Coke?
Spiced rum is the natural partner, because cola is itself built on cinnamon, citrus and vanilla and the two share a register. White rum is lightest and cleanest, gold and aged rums meet the cola’s caramel, and a dark Jamaican rum makes something funkier and more divisive.
Can I use diet cola?
You can, and the drink suffers. The sugar is doing structural work against the rum rather than simply sweetening, so a diet version tastes hollow underneath and the artificial sweetness lingers in a way that fights the spirit rather than balancing it.
Where this one sits
Recipe by Jerry Can Spirits
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