Place the cashews into a bowl and cover them with room temperature water. Allow the cashews to soak in the fridge overnight or for about 8 hours.
Once your cashews have soaked, drain and rinse them and place them into a blender with the remaining ingredients, starting with just ¼ teaspoon of salt
Blend until smooth, stopping to scrape down the sides of the blender as necessary.
Taste and add more salt for saltiness or lemon juice/apple cider vinegar for a more tangy, sour kick.
Pour the sour cream into a jar and seal it with a lid. Place it in the fridge.
Video
Notes
This sour cream can be stored for in the fridge for 1 week or frozen for up to 1 month. If you plan to freeze the sour cream, I recommend freezing it in smaller portions so you thaw a smaller amount as needed.