From the brewery:

Is it a sparkling wine or a beer? That is the question amateurs of exceptional products ask when they discover our Cassis for the first time. Cassis Lindemans is a fruity beer made from a lambic base which, thanks to its shades of dark purple and its aromas, is spontaneously reminiscent of wine. The taste of Cassis Lindemans on the palate is inimitable: intense and sparkling with a sour-sweet finish.