Place cashews in a small bowl and cover with water.
Cover and put in the refrigerator for 8 hours or overnight.
Drain and rinse the cashews.
Place cashews in a blender with the 1 cup water along with optional vanilla extract and salt (if using).
Blend until smooth and creamy. Use immediately or store in the refrigerator for later use.
Notes
A teaspoon or two of sugar or sugar alternative can be added for sweetness.Different flavor extracts can be used for flavored creamer.Use up within 10 days or freeze up to 3 months.