Boil the cashews: Place the cashews in a saucepan and cover with 2 inches hot water. Bring to a boil and boil at a high boil for 10 minutes (high speed blender) to 15 minutes (standard blender). Alternatively, you can soak the cashews for at least 1 hour, more if you have time.
Blend: Add all ingredients to a blender and blend for a few minutes until a smooth texture forms. Stop, scrape and blend again as necessary. Store refrigerated for up to 5 days.