Based on the opinion of six chefs, the best fast food signature sauce comes from a classic chain and has been around for decades. The best special sauce also lacks ketchup, despite all appearances.

Join fast food chef Jack from Hong Kong as he tries popular American fast food items from McDonald's, Wendy's, and KFC.

Chefs, too, have their favorite fast-food indulgences, and Southern chefs know a thing or two about fried chicken. After a long work day—no matter the task—there's nothing better than taking a crunchy ...