The Chicago Cocktail is a brandy-based mixed drink named after the city of Chicago, Illinois. It appeared in multiple cocktail manuals dating back to the 19th century. The main ingredients are brandy, triple sec, and bitters. Some versions do call for the Champagne to be added.
Mix the brandy, triple sec and bitters with ice in a shaker.
Shake and strain into a glass.
Garnish with lemon peel or slice.