Soak cashews overnight. Drain. Put in blender with just enough water to allow blender to do its job. Add only enough water to make it smooth, then add dates one at a time, or agave syrup or maple syrup to sweeten, taste for sweetness. You want to achieve a fluffy whipped-cream type consistency. I like it best when vanilla is added too.
1 cup of cashews will make 1 1/2 or more cups of cashew crème.