Skunk vine powder can be purchased online but there is likely to be a long overseas delivery time. Another way of obtaining this powder is from Chinese bakeries that use the powder; it may be helpful to show the Chinese characters for it, 烏芹藤粉. I highly recommend using glutinous rice flour from Erawan brand for the finest grind that will give you smoother rice cakes. We spoon rice flour into a measuring cup and then level it for the most accurate measurement.