Rim a martini glass with sugar: Run a lemon slice around the edge of the glass and then dip the rim in sugar. Set aside.

In a cocktail shaker, combine the vodka, violet liqueur, lemon juice, and simple syrup. Fill the shaker with ice.

Shake well until the outside of the shaker feels cold, usually about 20 seconds.

Strain the mixture into your prepared martini glass.

Garnish with a slice of lemon and a violet flower if available.