Place mint leaves in a cocktail shaker and muddle gently to release oils.
Add coconut rum, lime juice, cream of coconut, and simple syrup to the shaker.
Fill the shaker with ice and shake for 10-15 seconds until well chilled.
Strain the mixture into a tall glass filled with fresh ice.
Top with club soda and stir gently with a bar spoon.
Garnish with a fresh mint sprig and lime wheel.
Notes
Store cream of coconut in the refrigerator after opening for up to 1 week.Choose fresh mint leaves without brown spots or damage for the best flavor.Make simple syrup by combining equal parts sugar and water, heating until dissolved.Make a virgin version by replacing coconut rum with coconut water.