Soak cashews and dates in warm water for at least 4 hours – preferably overnight.
Drain cashews and dates and place in a high-speed blender with remaining ingredients (except cinnamon whiskey).
Begin blending on lowest setting and slowly turn up to highest setting.
Blend on high for approximately 1-2 minute or until fully blended and creamy.
Chill at least one hour before serving.
Add a shot of cinnamon whiskey to each glass when serving if desired.