Black Glutinous Rice also called black sticky rice is a type of short-grained Asian rice that is especially sticky when cooked. Black Glutinous Rice are distinct strains from white glutinous rice. Milled rice is white in color, whereas the bran can give unmilled glutinous rice a purple or black color. Both black and white glutinous rice can be cooked as grains or ground into flour and cooked as a paste. It is called glutinous in the sense of being glue-like or sticky and not in the sense of containing gluten.