In a mixing bowl, combine the mayonnaise, buttermilk, and sour cream. Mix well until smooth and creamy.
Add the dried parsley flakes, garlic powder, onion powder, dried dill weed, black pepper, salt, and paprika to the bowl. Stir to thoroughly combine all the ingredients.
Taste the sauce and adjust the seasonings if needed. You can add more salt, pepper, or any of the herbs and spices to achieve the desired flavor.
Once the sauce is well-mixed and seasoned to your liking, transfer it to an airtight container or a squeeze bottle for easy serving and storage.
Refrigerate the Zaxby's Ranch Sauce for at least an hour before using to allow the flavors to meld together and develop.
Serve your homemade Zaxby's Ranch Sauce as a dipping sauce for chicken tenders, fried foods, or as a dressing for salads. Enjoy!