Add vodka, lemon juice, maple syrup, angostura bitters, and egg white (if using) to a cocktail shaker.
If using egg white, dry shake (no ice) for 10 seconds to create foam.
Add plenty of ice to the shaker.
Shake vigorously for 15–20 seconds until the shaker is cold.
Strain into a rocks glass or chilled cocktail glass over fresh ice.
Garnish with a cherry, lemon twist, or wheel if desired.
Optionally, dust a pinch of spice on top for aroma and visual appeal.
Serve immediately and enjoy!