Combine all ingredients in shaker with ice. Shake, strain into coup or martini glass. Double strain if using fresh grapefruit juice.
A Spontaneous Libation for your Consideration
1 1⁄2 oz Bourbon (Bonded; or Sub Scotch (Famous Grouse or Chivas work))
1 oz Grapefruit juice
1⁄2 oz Honey syrup (1:1 honey and water, boil and reduce)
1⁄2 bsp Scotch, Lagavulin 16 (can sub Laphraoig or other smoky Scotch)