sgnewt says:
"adjust the amount of sugar in this recipe to your preference"
-2 1/2 cups light rum
-1 1/4 cups freshly squeezed lime juice (half of juice from Key limes, if available)
-3/4 to 1 cup powdered sugar
-3 3/4 cups club soda
-10 large sprigs fresh mint (about 4 to 6 leaves each)
-Crushed ice
Stir rum, lime juice and sugar in large pitcher until sugar is dissolved. Add club soda and stir gently.
Divid mint among 10 glasses. Using back of spoon, crush mint sprigs in glasses.
Add crushed ice to glasses. Pour mojito mixture over mint and ice, dividing equally among glasses. Serve immediately.