Using Scotch instead of bourbon or rye also makes a tasty drink. You may also muddle a sugar cube with the bitters (and an orange wheel, if desired), then add the whiskey, stirring to dissolve the sugar, and strain over ice.
Fill a mixing glass halfway with ice cubes. Add:
Stir until well chilled, about 30 seconds. Strain over a large ice cube in a chilled rocks glass. Garnish with: