Classic Champagne Cocktail

INGREDIENTS:
Soak a sugar cube in bitters, drop it into a flute glass, fill the flute with champagne and garnish with a twist of lemon.

This Classic drink dates back at least to the mid-19th centuryl

Drop a maraschino cherry in as garnish

Serve champagne flute

From www.foodnetwork.com

Wikipedia says...

A champagne cocktail is an alcoholic drink made with sugar, angostura bitters, champagne, brandy and 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."