It's an old thread, but it seems to be the only one we have about the Smash!
Here is Dale DeGroff's Whiskey Smash with Rittenhouse rye, lemon, simple syrup, Angostura bitters, mint. Like a more refreshing, lighter weight version of a Julep.
And here is the Gin Basil Smash (Jörg Meyer) with 33 Portland dry gin, lemon juice, simple syrup, basil. It's super refreshing and basil marries really well with gin.
I was inspired to make both while reading Robert Simonson's A Proper Drink (also by Santa Ana/ the heat wave in San Diego a couple of weeks ago).