I made this with fresh grapefruit juice. It was a bit bitter. I would suggest 1.5 dashes of Angostura and upping the maple syrup to 0.5 Oz if you use fresh unsweetened grapefruit juice. Otherwise great flavours.
Wow- what surprise - I generally only use maple syrup with Bourbon or Rye in Old Fashioneds- but it made a BFF with Havana Club 3 anos. Not too sweet but I may try John's suggestion of Orange bitters next time.... and yes, there will definitely be a next time...
Enjoyed this cocktail but intrigued about its history. Where did you stumble across this gem of a recipe?
Incidentally, I made with Bacardi 8 which was probably a bit rich to be mixed with the maple syrup. Will try again with something a bit lighter, or might adjust the recipe. Any thoughts or tips would be welcomed!