Add the simple syrup and mint leaves to a cocktail shaker.

Muddle the mint leaves until fragrant — press and twist gently to bruise the leaves and release their oils. Don’t shred them.

Add ice cubes to the shaker.

Pour in the bourbon.

Shake well.

Fill a silver julep cup or rocks glass generously with crushed ice.

Strain and pour the julep over the crushed ice.

Garnish with a generous sprig of fresh mint. Cheers!