Amaretto Sour (Morgenthaler-style) – Bourbon Almond Citrus Sour Cocktail

The Amaretto Sour (Morgenthaler-style) is a refined take on the classic, bringing structure and balance to a traditionally sweet drink. By adding bourbon and bitters, this version keeps the almond richness of amaretto while delivering a cleaner, more complex sour.

Background

This modern version was popularized by bartender Jeffrey Morgenthaler in the early 2010s as a response to overly sweet Amaretto Sours. By introducing bourbon and proper sour technique, he rebalanced the drink into something more aligned with classic cocktail standards while keeping its approachable character.

What You’ll Need

Ingredients

• Amaretto – the sweet almond base that defines the drink
• Bourbon – adds structure, depth, and subtle oak spice
• Lemon juice – provides acidity and balance
• Angostura bitters – brings aromatic complexity and cuts sweetness
• Egg white – creates a silky texture and stable foam

No bourbon? Try rye whiskey for a spicier finish.

Equipment

• Shaker
• Strainer
• Fine strainer
• Whiskey sour glass

A Sour That Actually Balances

What sets this version apart is its structure. The bourbon anchors the drink, preventing the amaretto from becoming overly sweet, while bitters add depth and control. The result is a cocktail that feels complete rather than one-dimensional.

Substitutions & Variations

• Use rye whiskey instead of bourbon for a drier, spicier profile
• Skip the egg white for a lighter texture
• Add a barspoon of simple syrup if you prefer a slightly sweeter finish
• Try orange bitters for a brighter aromatic twist

Helpful Tips

• Always dry shake first to properly emulsify the egg white
• Double strain to achieve a smooth, refined texture
• Use fresh lemon juice for a clean, bright flavor
• Add a few drops of bitters on the foam for aroma and presentation