Drop the lemon wedges in a Double Old Fashioned glass and muddle to extract the juice.
Add the mint leaves and the simple syrup and muddle again.
Fill glass with ice and pour in the Bourbon, stir to combine.
Splash with club soda if desired and garnish with a fresh mint spring.
2 parts Bourbon
2-3 lemon wedges
6-8 fresh mint leaves
1 part simple syrup
Splash of club soda (optional)