In a Julep cup or highball glass, lightly muddle the mint and sugar syrup - don't over do it, 6 - 8 turns of the muddler should be enough. Add crushed ice, the bourbon and a splash of water. Stir well and garnish with a mint sprig.
Not sure how to muddle? <a href="http://www.toastmag.co.nz/spirits/master-muddle">Click here</a> for our guide