Add all of the ingredients to a high-speed blender and blend until it’s super smooth and creamy (like sour cream). Don’t stop blending until you get it there - you will! It could be up to 5 minutes of blending.
Add more water, if needed, 1 tablespoon at a time, until you reach sour cream-like consistency. Taste and add some salt if it needs it.
This will keep in the fridge for up to a week.