Crème de cassis, also known simply as cassis, is a blackcurrant liqueur. It is made by macerating blackcurrants in alcohol and then sweetening the mixture with sugar. 

There are many cocktails that can be made with crème de cassis. Some of the most popular ones include the blackberry cobbler, the black russian, and the kir royale. The blackberry cobbler is made by mixing crème de cassis, blackberry brandy, and lemon juice. The black russian is made by mixing crème de …