Add your soaked and drained cashews, water, salt, and any additional add-ins (optional) to a high-speed blender and blend until creamy and smooth. Keep the blender running for at least 1 minute to break down the cashews as much as possible.
Transfer milk to a jar or covered bottle and refrigerate. Will keep for up to 4-5 days, though best when fresh. Shake well before drinking, as it tends to separate.
Freeze in an ice cube tray to easily add small quantities to your favorite recipes.
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Notes
*Prep time includes soaking cashews in hot water. *Nutrition information is a rough estimate calculated without optional ingredients.