In a tall glass, add the mint and simple syrup. With the handle of a spoon, crush and mash the leaves to extract the flavors. Fill the glass with the crushed ice and pour in the bourbon. Using a tea spoon, jiggle the contents to mix and chill. Garnish with fresh mint sprigs.
Recipe adapted from Louisiana Real and Rustic Cookbook, by Emeril Lagasse, published by William Morrow, 1997