• Fill a cocktail shaker with ice.
• Add the bourbon, lemon juice, smoked bourbon syrup, and cinnamon.
• Shake well until chilled.
• Strain into a rocks glass over fresh ice.

Smoked Bourbon Syrup 

• Preheat a smoker to 225°F.
• Pour the maple syrup into a disposable aluminum pan and smoke for 12 hours, preferably using mesquite wood.
• Pour the bourbon into a small saucepan and simmer over medium-low heat until reduced by half, to about 1½ ounces.
• Whisk the reduced bourbon into the smoked maple syrup until thoroughly combined.
• Let cool completely to room temperature before using, then store refrigerated in an airtight container.