12 mint leaves, divided
1/4 cup Puetro Rican gold rum
1-1/2 T simple syrup (use less if you like a less sweet cocktail)
1-1/2 T lime juice
Bitters (I used Amaro bitters, but use any that you like)
1. Place 6 mint leaves in a cocktail shaker and muddle. Place the other 6 mint leaves in the bottom of your glass and muddle. (The handle of a wooden spoon works very well for this if you don't have an official "muddler.")
2. Add the rum, simple syrup, and lime juice to the cocktail shaker along with a couple of cubes of ice. Cover, and shake well until very cold.
3. Place another couple of ice cubes in your glass on top of the mint. Strain the cocktail over the ice. Top with a few shakes of bitters and enjoy!