Jeffrey Morgenthaler's reclaimed version of this long-maligned cocktail proves the Amaretto Sour can be sophisticated — almond liqueur balanced against real lemon juice and egg white produces a frothy, nutty sour that is both comforting and complex. The egg white is non-negotiable.
shaken · rocks glass · cubed
add
Combine amaretto, lemon juice, simple syrup, and egg white in a shaker without ice.
shake
Dry shake to emulsify, then add ice and shake vigorously until well chilled.
strain
Strain over fresh ice in a rocks glass.