Drain the cashews and dates, reserving the soaking liquid, and place in a high-powered blender with the remaining ingredients. Puree until smooth, scraping down the sides of the blender and using the reserved date soaking liquid to help facilitate blending.
Note: Cassia
cinnamon, which is the most common form of cinnamon available, contains high levels of courmarin, a naturally occurring substance which has the potential to cause liver damage when used in high doses. Select Ceylon cinnamon which contains only trace amounts of courmarin and has a sweeter, more delicate flavor.