Combine all ingredients into a blender or food processor. (I used my Vitamix.)
Blend on high until creamy and smooth.
Add more or less milk as needed until desired consistency is reached.
Notes
This makes a bland base dressing. To liven things up, try adding 1 T of Italian Dressing (or Italian Dressing mix) for a Creamy Italian Dressing. Or, try adding 1-2 tsp. of Taco Seasoning for a southwest ranch dressing. Both were really good. Enjoy!
Recipe by Home Baked Joy at https://www.homebakedjoy.com/creamy-avocado-ranch-dressing/