Floater
Albert Stevens Crockett. Old Waldorf Bar Days. 1931
Elizaveta Iufriakova
Build all ingredients in a champagne saucer filled with shaved ice. Top with more shaved ice.
"Note that this recipe is ostensibly a pre-Prohibition, early 1900s formula from the “big brass rail” of the original Waldorf Astoria" — MixologyTech for Martin’s Index of Cocktails and Mixed Drinks.