1 ounce vodka
1/2 ounce freshly squeezed lemon juice
1/2 ounce maraschino liqueur, preferably Luxardo
1/2 ounce Yellow Chartreuse
3 drops crème de violette, preferably Rothman & Winter
1 (1/4-inch-thick) cucumber slice
Place a cocktail glass in the freezer to chill.
Combine the vodka, lemon juice, maraschino liqueur, and Chartreuse in a cocktail shaker and fill the shaker halfway with ice. Shake vigorously until the outside of the shaker is frosted. Strain into the chilled cocktail glass, top with the crème de violette, and garnish with the cucumber slice