Rum Old Fashioned Cocktail recipe
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The Rum Old Fashioned takes the bones of the original Old Fashioned template—spirit, sugar, bitters—and shifts it into a distinctly rum-forward register. Rather than leaning on whiskey’s grainy depth, you’ll find this version celebrates rum’s richness and spice, especially when Jamaican styles take the lead. It’s less about a single fixed “classic” spec and more about a modern, tiki-adjacent twist on a foundational format, built to spotlight characterful rum while keeping the drink spare and serious.
On the palate, Jamaican rum brings bold, funky depth, while a measure of overproof rum lifts the aroma and adds extra intensity without changing the drink’s core shape. Falernum threads in its sweet, spiced accent, and a small touch of simple syrup smooths the edges and rounds the mid-palate. Aromatic bitters pull everything into focus, adding a dry, herbal snap that keeps the sweetness in check and makes the finish feel crisp.
You’ll enjoy this when you want something spirit-forward but not austere—an after-dinner sipper that still feels lively. It suits rum lovers who like intensity and spice, and it’s a great choice for slow evenings, small gatherings, or anytime you’d normally reach for an Old Fashioned but want a warmer, island-leaning mood.
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Lowball / rocks glass
Ingredients
Cocktail Colin says:
Jamaican rum leads with funky molasses and tropical depth, while overproof rum spikes the aroma and heat; falernum adds clove-lime sweetness that rounds the edges, simple syrup smooths the midpalate, and aromatic bitters stitch in spice and dryness. It works because the bitters and overproof rum keep the sugars from cloying, making a bold, spirit-forward sipper for rum lovers who want an Old Fashioned with extra spice and lift.
Method
How to make a Rum Old Fashioned
- Jamaican rum 30ml, Overproof rum 10ml, Falernum 7.5ml, Sugar / simple syrup 2.5ml, Aromatic bitters 1 dash
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- Begin by combining all the ingredients in a mixing glass filled with ice
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- Aim to stir them together gently but thoroughly for about 10-15 seconds to chill and dilute the mixture just right
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- Once stirred, strain the blend into a glass pre-filled with ice, opting for a large block of ice if available, as it melts slower and keeps your drink cool longer
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- This method ensures your cocktail is perfectly mixed and refreshingly cold, ready to be enjoyed
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FAQ's
What is the history behind the Rum Old Fashioned?
The Rum Old Fashioned is a twist on the classic Old Fashioned cocktail, which originated in the early 19th century. The traditional Old Fashioned is made with whiskey, sugar, water, and bitters. The Rum Old Fashioned substitutes whiskey with rum, specifically Jamaican and overproof rums, to give it a more tropical and potent flavor profile. This variation has gained popularity as rum enthusiasts and bartenders explore more diverse and complex flavors.
How do the flavors of Jamaican rum and overproof rum complement each other in this cocktail?
Jamaican rum is known for its full-bodied flavor, featuring fruity, spicy, and sometimes funky notes. Overproof rum, on the other hand, is much stronger in alcohol content and brings intensity and heat to the drink. When combined in the Rum Old Fashioned, the Jamaican rum lays a rich, flavorful foundation while the overproof rum adds a powerful kick and depth, making the cocktail more complex and engaging. The falernum and sugar syrup help to balance out the potency with sweetness and spice.
Why is falernum used in this cocktail, and what does it add to the flavor profile?
Falernum is a sweet syrup used in Caribbean and tropical drinks, made from ginger, lime, almond, and sometimes cloves or allspice. In the Rum Old Fashioned, falernum adds a layer of sweetness, spice, and a slight nuttiness, complimenting the depth and heat of the rums. The ingredient rounds out the cocktail, providing a balanced and exotic twist on the traditional Old Fashioned.
Can I use any type of rum for a Rum Old Fashioned?
While you can experiment with different types of rum to suit your taste, the combination of Jamaican rum and overproof rum is recommended for the best balance of flavors in the Rum Old Fashioned. Jamaican rum brings complexity and aromatic spice, while overproof rum offers potency and depth. Using other types of rum might alter the original flavor profile intended for this cocktail, but feel free to explore and find your preferred mix.
How should I serve a Rum Old Fashioned to best enjoy its flavors?
A Rum Old Fashioned should be served cold in a lowball glass, allowing the aromas and flavors to concentrate and making it more enjoyable to sip. Using a large ice cube or sphere can help maintain a cold temperature without diluting the cocktail too quickly. It's also important to gently stir the cocktail before serving to ensure that all ingredients are well-combined but not diluted. For garnish, consider using a twist of lime or an orange peel to add a refreshing aroma.
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