
I first had this drink at a wedding in Savannah, GA at the historic Kehoe House. It was the first time I can honestly say that I loved bourbon. It's best with fresh berries and mint and it's totally worth the calories. And I loved that it was served in pewter Jefferson cups!
Roughly chop the mint leaves.
Puree the mint, blackberries, and sugar in a blender. Press through a fine sieve into a bowl and discard the seeds.
Rinse the blender and return the puree to the blender. Add the bourbon and small ice cubes and blend just until smooth (don't ever mix!). Divide the mixture among 4 highball glasses. Garnish each drink with a mint sprig.
If possible serve in Jefferson cups.