Creme de Violette
Crème de Violette is a violet flavored crème liqueur. Crème liqueurs (not to be confused with cream liqueurs, made from a base spirit, flavorings, and cream) are so named due to their high levels of sugar, which provide a texture like cream.
There are many flavors of crème liqueurs, but all of them are syrupy in texture and around 30 proof.
While crème de violette was integral to many early 20th century cocktails, importation of the liqueur was sporadic at best until 1997, when Haus Alpenz introduced the Rothman and Winter brand.
Benoit Serres and Rothman and Winter are two examples of crème de violette. Crème de violette should not be confused with Crème Yvette or Parfait Amour, for while the colors of those liqueurs are similar, Yvette and Parfait Amour have vanilla and citrus aromas in addition to the violet backbone, which make them suspect substitutions in cocktails.