A Blackberry liqueur as blackberry should taste, dark berry, rich and full of fruit with a sweet taste. The liqueur may also be called Crème de Mure.It is hard to trace the exact origin since blackberries proliferate all over the globe. Greeks and Romans used blackberries in medicine, and Native Americans used them for food, medicine and to dye animal skins. Blackberries are also known as bramble, brummel, brambleberry and bly.