Wikipedia
A champagne cocktail is an alcoholic drink made with sugar, Angostura bitters, Champagne, brandy and a maraschino cherry as a garnish. It is one of the IBA Official Cocktails.
A recipe for the cocktail appears as early as "Professor" Jerry Thomas' Bon Vivant's Companion (1862), which omits the brandy or cognac and is considered to be the "classic" American version.
Examples of Champagne cocktails being consumed in fiction include the Victor Laszlo and Captain Renault characters in Casablanca (1942), Nora Charles ( Myrna Loy) in the Thin Man movies, and General Sternwood in Raymond Chandler's novel The Big Sleep, who requests his with "a third of a glass of brandy under the Champagne and the Champagne cold as Valley Forge. Colder if you can get it."
Usage examples of "champagne cocktail".
Barbara Streisand handed me a champagne cocktail and introduced me around and, ha ha, I felt like giving a press conference, so many people asking questions about my life.
Rupert and Billy mixed a champagne cocktail to start off with, which, with one and a half hours solid drinking before dinner, got everyone plastered.
So to do that, Gloria will get a man to buy you a champagne cocktail.
My agent Serafina Clarke may not be entirely au fait with the Internet but makes a superb champagne cocktail, a far more desirable skill.
Annabelle smiled and ordered a champagne cocktail from a hovering waiter.
Thanks to a passing waiter, she nursed a champagne cocktail as she studied a pair of stunning snakeskin evening sandals.
By four-fifteen, she'd ordered a second champagne cocktail and begun to steam.
She was still sexy, Vulkan thought, and in spite of all his resolution found himself sending the barman across to her with a champagne cocktail.