Fill an old-fashioned glass with ice and add - in order - the bitters, bourbon/whiskey, vermouth and brandy. This should only require a little stir to mix the ingredients enough. Twist the orange peel over the drink and drop in: voilá!
Note: As with all bourbon or whiskey drinks, DO NOT use SoCo; it is not at all related to bourbon or whiskey and makes this and any other drink taste COMPLETELY different.