Half an ounce of honey syrupa simple syrup made from equal parts water and honey, simmered, cooled
Ice cubes
Optional: Small grapefruit slicefor garnish
Instructions
Combine the bourbon, grapefruit juice, and honey syrup in a shaker with ice cubes and shake vigorously for at least eight seconds.
Strain into a chilled coupe glass or rocks glass and garnish with the grapefruit slice.
Notes
Fresh grapefruit juice really does make a difference in flavor, though you can use store-bought if you need to
The honey syrup is super easy to make, just use equal parts honey and water to make a simple syrup (bring to a simmer and super light boil over medium heat and immediately remove from heat to thicken)