The Whiskey Smash is easy drink recipe made for your bar shaker. The drink offers a balance of citrus, mint, and sour mash spirits.
1/2 lemon juiced. (use the whole thing if it's a small lemon)
12 leaves mint reserve a top for garnish
1 fluid oz simple syrup
2 fluid oz bourbon whiskey
Into a shaker, squeeze the lemon and throw in its corpse as well. Add mint, simple syrup and bourbon. Fill the shaker two-thirds with ice. Shake the crap out of everything and strain into a rocks glass with clean ice. Garnish with the mint top.
Source: Something Editable