Charless Daiquiri
1/4 oz dark rum
1 1/2 oz white rum
1/2 tsp powdered sugar
1/4 - 3/4 oz sugar syrup
3/4 oz lime juice
2 - 3 dashes Cointreau orange liqueur
Special instructions:
Shake well over ice cubes in a shaker, strain into a chilled cocktail glass, and serve.