Woah this is really good! Out of bourbon, subbed Jack Daniels and reduced the rich syrup to 5ml. All the flavors are in perfect harmony, an exceptional chorus!
I'm not a fan of whiskey sours, of which this is a variant, and at first sip I thought I'd made a bad choice. However, as I sipped more of it, it grew on me. The mint, grenadine, and absinthe add a nice complexity of flavor. I did substitute commercial simple syrup for the 2:1 specified in the recipe, and that probably balanced it a bit.
Maybe my lemons are too sour, but this cocktail isn't too sweet at all. It's delicious, but everything is about lmeon and absinthe. I didn't have mint. Whiskey here just adds strength, IMHO.
Had a Millionaire Martini yesterday, so would have to follow up this this cocktail. It is wonderful.
Also found it a bit sweet and would omit the sugar syrup the next time. Did find the mint and absinthe helped cut some of the sugar. We tend to like our cocktail a bit on the dry side, so it may be perfect if you prefer a cocktail which is sweeter.