Add whiskey, lemon juice, egg white and syrup in a cocktail shaker and dry shake (without ice) for 20 seconds. Add a few cubes of fresh ice and shake 30 seconds until well chilled. Strain into a rocks glass filled with ice.
Slowly pour wine over the back of a bar spoon so that the wine floats on top of the drink.
Egg white: for ease and food safety reasons, use pasteurized egg whites. You can find them sold next to the eggs in a carton.
Keywords new york sour, red wine cocktail, whiskey cocktail, whiskey sour