Pour the syrup into a Highball glass and fill with crushed ice.
Add the rest of the ingredients to a shaker with ice, and shake until chilled.
Strain over the crushed ice.
Garnish with a lemon twist and raspberry.
*Raspberry syrup: In a small glass, muddle 6 raspberries. Add 6 oz simple syrup and stir. Fine-strain into a separate glass to remove the seeds.