Grab a highball glass and place about 10 mint leaves in the bottom then add about a teaspoon and a half of sugar. Next you're going to need to muddle your ingredients. Work the sugar into the mint into the mint leaves break apart, next add a squirt of water to break up the sugary minty goodness. Now fill the glass up with ice, and add the bourbon. Finish the drink off with a bit more water. Enjoy!