Olive Garden Signature Italian Dressing. Italian kitchen. Net 24 fl oz (1.5 pint) 709 ml. Signature Italian Dressing: This recipe has been a favorite with our guests for almost 30 years. Makes a lightly creamy and crisp tasting salad. Also good as a dip for vegetables. Questions or Comments 1-888-254-0314. www.olivegarden.com.