Begin by preparing a blackberry and sage simple syrup. Place 2 cups of sugar and 1 cup of water in a pot and bring to a rolling boil.
Boil for 3 minutes to make sure all the sugar is dissolved, then add 1 cup of blackberries.
Stir the blackberries in and some will dissolve. I stir for about an additional 3 minutes, until I still have a fair amount of blackberry pulp, but the mixture is purpley black.
Add the 6 sage leaves cut into strips.
Stir to combine the sage, and then pour the entire mixture through a strainer into a jar.
Chill for 2 hours or more.
In a cocktail shaker mix 1 shot of bourbon, 1 shot of ginger beer, and 1 tablespoon of the blackberry simple syrup.
Shake the cocktail mixture, and then pour through a strainer into a coupe glass.
Make some sugared blackberries by rolling fresh berries in granulated sugar. Pierce two sugared berries with a cocktail pick, and add a sage leaf. Place on top of glass, and serve.