In a medium bowl, combine the mayonnaise, sour cream, salt, pepper, garlic powder, onion powder, and paprika.

Gradually add the milk to the mixture while stirring continuously. The amount of milk you add will determine the thickness or thinness of the dressing, so adjust it according to your preference.

Taste the dressing and adjust the seasonings as needed. Add more salt, pepper, or other spices to suit your taste.

Once you've achieved the desired consistency and flavor, your creamy ranch dressing is ready to serve!