Really cool history on this particular cocktail.
After prohibition a number of Russian and Polish bars and restaurants that catered to immigrant populations in America began (or continued more openly) serving traditional spirits along with their traditional cuisine. Vodka being the spirit of choice for many, it is no wonder that cocktails were born behind these bars that featured the spirit. The Gypsy Queen, recently unearthed by David Wondrich, was created at the Russian Tea Room and can be found in the book "Russian Dishes and What They Are Made Of"
2 oz Absolut Vodka
1 oz Benedictine
2 dashes Angostura Bitters