Add the bourbon, juices, Sugar Gum and bitters to a metal cocktail shaker. Top with ice cubes, seal and shake vigorously.
Fill a small mason jar with ice cubes and fresh mint. Strain the liquid over the ice and stir. Top with shaved ice. Garnish with the muddled blackberries.
In small saucepan, combine the sugar and 1/2 cup water. Bring to a boil and stir until combined. Cool, bottle and store until use.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
Recipe courtesy of Dave Whitton at Villains Tavern