Place basil leaves in the cocktail shaker and muddle gently to release oils.
Add vodka, pineapple juice, simple syrup, and lime juice to the shaker.
Fill shaker with ice and shake for 10-15 seconds until well chilled.
Strain mixture into a Collins glass filled with fresh ice.
Top with a splash of club soda and stir gently.
Garnish with fresh basil leaves and a pineapple wedge.
Notes
The drink tastes best with fresh pineapple juice rather than canned.Store-bought simple syrup works well, or make your own by mixing equal parts sugar and hot water.Fresh lime juice adds brightness - avoid bottled lime juice for the best results.Make it non-alcoholic by replacing vodka with extra pineapple juice and club soda.The basil leaves should be fresh and bright green for the best flavor and aroma.