Rum Sour

A silky, tropical spin on the classic sour template: dark rum, fresh lemon, and a foamy egg white give it a rich, creamy texture.

Rum Sour cocktail made with rum, served in a rocks glass
Base
rum
Glassware
Rocks glass
Flavor Profile
soursweet

Ingredients

  • 2 oz dark rum
  • 0.75 oz fresh lemon juice
  • 0.75 oz simple syrup
  • 1 egg white
  • Angostura bitters, to garnish

Instructions

  1. 1Dry shake rum, lemon juice, simple syrup, and egg white without ice to build foam.
  2. 2Add ice and shake again until well chilled.
  3. 3Strain into a rocks glass over fresh ice and dash bitters on the foam to garnish.

Origin & Story

United States/Caribbean, mid-1800s

The Sour format — spirit, citrus, sugar — is one of the oldest cocktail templates, and rum is perhaps its most natural home, given the spirit's Caribbean heritage alongside sugarcane and tropical citrus. The egg white variant adds a frothy cap that moderates the acidity and makes every sip feel more substantial, elevating a simple drink into something genuinely elegant.