Muddle 6 blackberries and 6 mint leaves in a Boston Shaker with ¼ part simple syrup.
In the mixing glass, combine Basil Hayden's® Bourbon, lemon juice and remaining simple syrup and add to the muddled blackberries and mint leaves.
Add ice and shake.
Double strain into a Collins glass with fresh crushed ice.
Top with sparkling wine.
Garnish with a skewered mint leaf and blackberry.