We recommend Turbinado or Demerara syrup for this cocktail.
Lightly muddle two blackberries in a shaker tin and add one sage sprig. Add remaining ingredients and shake lightly, for just long enough to mix the ingredients together. Fine strain into a julep or cheater tin, and cover with crushed ice to create a small snow cone over the top of the tin.
Garnish with the remaining sage sprig and blackberry. Serve with straws.