In a julep cup, muddle the mint leaves in ¼ ounce simple syrup. Add the bourbon and fill the cup with crushed ice.
Stir until the cup becomes frosted on the outside. Taste, adding more simple syrup for a sweeter drink.
Top with more crushed ice to create a dome and garnish with more mint.
The mint julep cocktail is made with bourbon and sweetened with simple syrup. I like to use a minty homemade simple syrup which you can make ahead with this recipe and store in the refrigerator. This refreshing cocktail deserves to be served in frozen silver goblets or the most elegant glasses you have — perfect for Kentucky Derby viewing!