In cocktail shaker muddle the peach, mint leaves and simple syrup with some crushed ice. Add bourbon and shake well. Strain into cocktail glass filled with ice. Top with a splash of ginger beer.
*I made a brown sugar simple syrup by combining 1 cup brown sugar with 1 cup water and bringing it to a boil. Let cool and store in refrigerator. Read more about making simple syrup here. You could also use regular simple syrup or maple syrup.
Find it online: https://www.imbored-letsgo.com/bourbon-peach-cocktail/