Chill a cocktail glass by filling it with ice water and setting aside.
Combine vodka, triple sec, and freshly squeezed lemon juice in a cocktail shaker.
Fill the shaker with ice.
Shake vigorously for 10–12 seconds until well chilled.
Discard the ice water from the cocktail glass.
Double-strain into the chilled cocktail glass.
Garnish with a lemon twist or sugared lemon wheel on the rim.
For a more polished presentation, rim the glass with superfine sugar before chilling - it adds a delicate sweetness on each sip and signals the drink's flavour profile before a drop touches the lips. Always use freshly squeezed lemon juice; bottled juice will flatten the vibrant citrus character that defines this cocktail.
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