I've been making bitters faster than I can taste-test them, but I finally got the chance to try out my new cucumber bitters.
As with A Dark Day on Broadway, this recipe is courtesy of "Handcrafted Bitters" by Will Budiaman.

The Mint Julep, a classic drink for warm summer evenings. Cooling and refreshing with lots of room for experimentation.
1/2 oz simple syrup
~15 mint leaves
3 dashes cucumber bitters
3 dashes Angostura bitters
Combine and muddle in highball glass.
2 oz bourbon
1/2 glass crushed ice
Stir until glass is frosted.
Top with ice as needed, and soda water or Sprite for a little fizz.
Garnish with a mint sprig.