Add the cherries and simple syrup to the cocktail shaker and muddle until the cherries break down and are nice and juicy.
Pour in the vodka, lemon juice, egg white and bitters. Put on the cocktail shaker top and shake without ice for 30 seconds. This is our dry shake.
Add a handful of ice. Shake again for at least a minute to continue building that frothy topping. This is our wet shake.
Strain into a chilled sour or coupe glass. If desired, garnish with a lemon twist. Enjoy every refreshing sip!