Borinquen Rum Cocktail

Pro tips

• Crush ice finely just before serving to maximize chill and slow dilution without over-watering the drink.
• Use fresh lime and orange juice—bottled versions lack the brightness that balances passion fruit syrup's richness.
• Float the 151-proof rum last over the back of a bar spoon to create a visible layer and preserve its high-proof character.
• Chill your glass with ice or refrigeration before pouring to extend the drink's freshness.

Substitutions

• Old Mr. Boston Rum → Bacardi or Mount Gay (neutral aged rum, similar proof)
• Passion Fruit Syrup → grenadine or homemade passion fruit reduction (slightly different flavor, same sweetness role)
• Crushed ice → cubed ice (melts faster, less texture contrast)

Storage & make-ahead

This cocktail is best served immediately. If batching the base (rum, syrups, juice), refrigerate up to 4 hours; add ice and float the 151-proof rum at service.

Equipment

bar spoon (for floating technique) · cocktail shaker or mixing glass · jigger (for precise 1.5 oz and 1 tsp measures) · ice crusher or Lewis bag

Can I make this without 151-proof rum?

Yes. Use regular aged rum (80-proof) in place of the 151-proof float, though you'll lose the intensity. Alternatively, skip the float entirely for a softer finish.

What type of passion fruit syrup should I use?

Store-bought passion fruit syrup or grenadine-style syrups work best. You can also make your own by simmering fresh passion fruit pulp with sugar and water, then cooling.

How do I properly layer the 151-proof rum float?

Pour the 151-proof rum slowly over the back of a bar spoon held just above the surface of the drink to float it on top without mixing.

Can I batch this cocktail in advance?

Mix the rum, passion fruit syrup, and juices in a pitcher up to 4 hours ahead. Add crushed ice and float the 151-proof rum just before serving.

What size glass should I use?

A 6–8 oz coupe or rocks glass works well. Serve over crushed ice to keep it cold and dilute slowly as it melts.