Add diced mango to the cocktail shaker and muddle until smooth.
Pour in the white rum, lime juice, orange juice, and simple syrup.
Fill the shaker with ice and shake vigorously for 15-20 seconds.
Strain the mixture through a fine-mesh strainer into a hurricane glass filled with fresh ice.
Garnish with a mango slice and mint sprig.
Notes
The drink tastes best with fresh, ripe mangoes. Frozen mango chunks work as a substitute when fresh aren't available.Store leftover simple syrup in an airtight container in the refrigerator for up to 2 weeks.For a frozen version, blend all ingredients with 1 cup of ice until smooth.To make it non-alcoholic, replace the rum with coconut water or club soda.