Authentic ketchup tastes tangy and mildly sweet. If it tastes unusually sugary, metallic, or artificial, it could be chemically altered. A lingering chemical aftertaste is a strong giveaway. 4.

Shouts of “Blasphemy!” followed by the loud clanging of a bell are what happens when a customer orders ketchup on their hot dog at Michiganders Windy City Diner. Despite being 150 miles away from ...