Dark ’n’ Stormy Recipe: Best Rum-to-Ginger Beer Ratio
Approx. 6 min read
Dark ’n’ Stormy ratio: start with 1:3
A great Dark ’n’ Stormy is all about contrast: cold, spicy ginger beer below, rich dark rum drifting through it like a storm cloud. For an easy first glass, use 60 ml (2 oz) Goslings Black Seal Rum and 180 ml (6 oz) chilled ginger beer. That is Goslings' own 1:3 recipe.
Want more rum flavour? Keep the rum amount the same and pour less ginger beer. The International Bartenders Association (IBA) uses a shorter, stronger serve, so there is more than one established starting point. The quick comparison below makes the choice easy.
Easy Dark ’n’ Stormy recipe
Recipe details
- Prep time: 2 minutes
- Difficulty: Easy
- Serves: 1 cocktail
- Glass: Roomy highball or Collins glass
- Tools: Jigger or measuring cup; spoon optional
- Taste: Spicy ginger, rich rum, lively bubbles
Ingredients
- 60 ml (2 oz) Goslings Black Seal Rum
- 180 ml (6 oz) chilled Goslings Stormy Ginger Beer, or another ginger beer you enjoy
- Plenty of fresh ice
- 1 lime wedge, optional
How to make it
- Fill a roomy highball glass generously with ice.
- Pour in the cold ginger beer.
- Slowly pour the rum over the back of a spoon held near the drink's surface. Let the dark rum curl into the lighter ginger beer.
- Enjoy the storm-cloud effect, garnish with lime if you like, then stir gently before your first sip.
Quick tip: Open the ginger beer just before pouring. A cold, freshly fizzy mixer makes this simple drink shine.
Three ratios worth trying: 1:3, 1:2 and 3:5
Keep the rum at 60 ml (2 oz) and change only the ginger beer. Here is what you can expect from each pour:
- 1:3 - Goslings recipe: 60 ml rum + 180 ml ginger beer (2 oz + 6 oz). Long, bubbly and ginger-forward. Best place to start.
- 1:2 - a rum-forward adjustment: 60 ml rum + 120 ml ginger beer (2 oz + 4 oz). A little shorter, with richer rum notes coming through.
- 3:5 - IBA recipe: 60 ml rum + 100 ml ginger beer (2 oz + about 3.4 oz). The shortest and most rum-forward of the three.
These are rum-to-ginger beer ratios before the ice melts. Your mixer matters as much as the numbers: one bottle may taste sweet and gentle, another dry and fiery. Taste it on its own first, then pick your pour.
For the 1:3 version, allow room for 240 ml (8 oz) of liquid plus ice. A small highball can overflow quickly. Use plenty of solid cubes rather than crushed ice if you want the drink to stay cold without watering down too quickly.
Find your favourite with a mini taste test
For a simple side-by-side comparison, set out three small glasses with similar amounts of ice. Pour 30 ml (1 oz) rum into each, then add 90 ml (3 oz), 60 ml (2 oz) and 50 ml (about 1.7 oz) ginger beer respectively. Those are half-size versions of the three ratios. Use the same brand of ginger beer throughout so you are actually comparing proportions, not mixers. Stir and take a small sip from each, or share the samples with a friend. You may find that your favourite is not the one you expected. Once you know the winner, use the full-size quantities above for your next drink.
The storm-cloud trick: how to float the rum
This is the Dark ’n’ Stormy moment worth seeing: pale, sparkling ginger beer beneath a dark rum cap, with soft brown curls moving through the glass like a passing storm cloud.
Pour the ginger beer over ice first. Then hold a spoon close to the surface and let the rum run slowly over its back. Pause for a few seconds. The rum may form a dark top layer before it slips into the bubbles, creating a more natural swirl than any perfectly straight line.
The float is temporary, and some bottles mix faster than others. That is fine. If you are serving friends, make the floats one glass at a time so everyone gets to see the colour change. Pouring the rum from high above the glass will disturb the surface, so keep the spoon low and your hand steady.
Enjoy the layers for a moment, then stir lightly before drinking so the flavours come together. The storm cloud is a lovely little extra, not something you need to get perfect.
Which rum and ginger beer work best?
Goslings Black Seal Rum for the original
There is a reason the brand name matters here: DARK ’N STORMY is a registered Goslings trademark, and the authentic branded recipe uses Goslings Black Seal Rum. It brings deep, warming flavours that stand up well to ginger.
Another dark rum can still make a delicious rum-and-ginger highball at home. Just treat it as your own variation, rather than the original branded serve.
Pick ginger beer by taste
A drier, spicier ginger beer brings bite; a sweeter one makes a softer, rounder drink. There is no need to buy the most expensive bottle, but choose one you enjoy on its own. Ginger ale will make a milder variation with less ginger heat.
Not sure which mixer to use? Our ginger beer vs ginger ale guide explains the difference.
One small tweak: add lime if you like
The original two-ingredient drink does not need lime juice, but a squeeze can brighten a particularly sweet ginger beer. Start with about 5 ml (0.2 oz / 1 tsp) of fresh lime juice, taste, and leave it there if it works. A wedge on the rim is all the garnish you need.
Dark ’n’ Stormy FAQ
Can you make Dark ’n’ Stormy cocktails for a group?
Yes, but keep the ginger beer chilled and unopened until serving. Measure the rum ahead, fill individual glasses with ice, then add ginger beer and float the rum at the last moment. The bubbles and stormy layers are best when freshly poured.
Why won't the rum stay on top?
The layers depend on the rum, the ginger beer and the way you pour. Even a careful float may sink quickly as the bubbles move. Pour gently with the spoon near the surface, enjoy any swirls you get, and do not worry if the drink mixes itself.
How is a Dark ’n’ Stormy different from a Moscow Mule?
A Dark ’n’ Stormy combines dark rum and ginger beer, with lime optional. A Moscow Mule uses vodka, ginger beer and lime juice, so it is brighter and less rich. Try our Moscow Mule ratio recipe if you love that ginger kick.
Final sip
A little rum, a lively ginger beer and that beautiful dark swirl: this is a cocktail that looks like effort but takes two minutes. Start with the Goslings pour, then try a shorter version next time if you want more rum character. For another easy evening drink, browse these seven dark rum cocktails beyond rum and coke.
