Acapulco – Rum Sour with Orange Liqueur & Egg White Foam

A clean, citrus-forward rum cocktail with a smooth foam finish, the Acapulco sits between a classic daiquiri and a refined sour. The combination of rum, lime, and orange liqueur gives it a tropical edge, while the egg white rounds everything out into a soft, balanced drink that feels more polished than its simple build suggests.

Background

The Acapulco isn’t a strict classic but reflects mid-20th-century cocktail trends, when tropical flavors and sour formats started blending more freely. By adding egg white to a rum and citrus base, it bridges tiki influence with classic sour technique, creating a drink that prioritizes both texture and balance.

What You’ll Need

Ingredients

• Light rum – the clean, slightly sweet backbone of the drink
• Triple sec – adds orange sweetness and layered citrus depth
• Fresh lime juice – brings sharp acidity and structure
• Simple syrup – smooths and balances the citrus
• Egg white – creates a rich foam and softens the texture

Substitutions:

• No triple sec? Use Cointreau or orange curaçao for a sharper orange note
• Want more depth? Swap part of the rum for a lightly aged rum
• Avoiding egg white? Use aquafaba for a similar foam

Equipment

• Cocktail shaker
• Jigger
• Fine strainer
• Coupe glass

What Sets It Apart

A Softer Take on a Daiquiri

This drink builds on a daiquiri-style base but shifts the texture completely. The egg white softens the lime’s edge and rounds out the sweetness, creating a smoother, more layered version of a classic rum sour without losing its brightness.

Substitutions & Variations

• Split the base with aged rum for a richer profile
• Add a dash of bitters on the foam for aroma and contrast
• Slightly increase lime juice for a sharper, drier version
• Use demerara syrup instead of simple syrup for deeper sweetness

Helpful Tips

• Always dry shake first to properly emulsify the egg white
• Shake hard after adding ice to achieve proper dilution
• Double strain for a smoother, more refined texture
• Chill your glass to keep the drink crisp
• Taste before straining if you want to fine-tune balance