Combine cashews, oats and cinnamon in the bowl of a food processor and process for 30-60 seconds, or until the consistency of cornmeal is reached.
Add dates and nut butter and pulse until mixture is combined, stopping occasionally to scrape sides. Mixture should be moist enough to form into balls and hold their shape. If not, add an additional teaspoon nut butter and mix. Repeat if necessary.
Using approximately 1 tablespoon of the mixture at a time, roll into balls and place in an air-tight container and refrigerate until ready to eat.
NOTE: Due to the nature of preservative-free foods, these cookies are best if eaten within one week, otherwise they may be frozen until ready for consumption.