Add cherries and simple syrup to an empty cocktail shaker. Muddle together until cherries are smashed.

Add vodka, lemon juice, cherry simple syrup, and egg white. Close the shaker and shake vigorously, until a nice foam is achieved. This is also known as a dry shake.

Add ice and shake briefly, until chilled.

Strain into a chilled coupe glass or a cocktail glass filled with ice.

Garnish with cherries and serve.