Add all ingredients (except the garnishes) to an ice-filled shaker. Shake until very cold. Strain into ice-filled rocks glasses and garnish with a lemon wedge and a whole blackberry.

*Blackberry Syrup

In a small saucepan, bring the sugar, blackberries and water to a boil. Remove from heat and mash the berries. Let the mixture steep for 10 minutes. Strain into a jar. Store in the fridge, makes 6 tablespoons of syrup.