1/2 teaspoon simple syrup (see Cook's Note)
2 to 3 dashes orange bitters, such as Angostura
Pinch ground cinnamon
2 ounces good-quality bourbon
Orange twist, for garnish
If you don't have simple syrup on hand, add 1 sugar cube and a few dashes of water instead. Stir well so that the sugar dissolves into the water and bitters before adding the bourbon.