Kentucky Fried Chicken does not share the exact recipe for its famous cole slaw recipe, but the company does list the ingredients when cole slaw is featured in promotional materials. The materials do not indicate what goes into the signature dressing. Cabbage, carrots and onions comprise the base of the slaw.
Todd Wilbur's Top Secret Recipes provides a copy-cat recipe of Kentucky Fried Chicken's famous cole slaw. The signature creamy dressing calls for mayonnaise, sugar, milk and buttermilk. The mayo base must be mixed with lemon juice, vinegar, salt and pepper. The copy-cat recipe also includes the cabbage, carrot and onion base. Instructions state that the mixture must be refrigerated for at least two hours.