The Buck’s Fizz is a bubbly cocktail made of orange juice and Champagne. The recipe is an official IBA (International Bartender Association) recipe. The Buck’s Fizz was invented at Buck’s Club in London, and the original recipe was made with Bollinger Champagne. Yes, it is true that the better the quality of the Champagne the better the flavour. The Mimosa cocktail was invented a few years later in Paris.