12 fresh spearmint
3 tablespoons lime juice
2 tablespoons sugar syrup
1 1/2-2 ounces rum, to taste
2 ounces club soda, more to taste
Fill a glass 1/3 full with crushed ice, and place mint leaves and sugar syrup on top. Using a muddle stick or wooden pestle, mash them together for about 20 seconds. Add the rum and club soda and stir well. Garnish with mint sprig, serve.
To make sugar syrup, dissolve 1 part sugar into 1 part hot water and boil until thickened.