Soak cashews in 3 cups water in bowl or jar overnight (or about 12 hours) to soften.
Once softened, strain cashews and discard water the cashews soaked in.
Add cashews to high-powered blender (I prefer Vitamix), along with remaining water, vanilla, cinnamon and sea salt. Feel free to sweeten with a splash of maple syrup or honey, or a pitted date.
Blend on high for 2-3 minutes. No need to strain cashew milk if nuts were able to soak for 12+ hours!!
Pour cashew milk in milk jug or other storage jar and refrigerate. Lasts up to 4 days. Enjoy!