In a cocktail shaker half filled with ice cubes, pour in bourbon, Aperol and Amaro Nonino. Then add freshly squeezed lemon juice.
Shake for 10-15 seconds until well chilled.
Pour into a chilled coupe glass. Garnish with a tiny paper plane or an orange twist.
Notes
If you don’t have Aperol on hand, you can substitute in Campari, but the resulting cocktail will be more bitter (add a bit of simple syrup, to taste, to counteract this).
Amaron Nonino is a bit pricey (around $50 per bottle) and can be tricky to find. Some substitutions are Amaro Averna, Amaro Montenegro or Cynar (which is Italian Amaro).
Garnish ideas: A tiny paper plane is the most adorable garnish. Other ideas are a lemon peel or orange twist.