Best mix of ubiquity, familiarity, and cross-meal use.
Best evidence
Ketchup earns the top slot because it is the default sweet-tangy condiment for fries, burgers, eggs, meatloaf, and fast food in much of the world, with strong shelf presence and an unusually broad age-group appeal.
Its role as both topping and building block makes it more useful than its reputation suggests.
Best evidence
Mayonnaise ranks high because it is both a condiment and a base ingredient: it works on sandwiches, fries, salads, dips, sauces, and dressings, giving it more culinary range than most table condiments.
Less universally loved than ketchup or mayo, but more flavor-dense and culinarily flexible.
Best evidence
Mustard is one of the most efficient condiments: a small amount adds acid, heat, bitterness, and aroma to hot dogs, sandwiches, pretzels, vinaigrettes, marinades, and sauces.
Its global culinary importance is enormous, but it is slightly less universal as a standalone topping.
Best evidence
Soy sauce belongs near the top because it is a foundational umami condiment and seasoning, essential across many East and Southeast Asian cuisines and increasingly common in marinades, stir-fries, soups, rice dishes, and fusion cooking.
Its ability to upgrade many foods gives it outsized value, though polarization around spice keeps it below the classics.
Best evidence
Hot sauce makes the top five because it can transform bland food instantly, spans many regional styles, and has grown from niche heat-seeking into a mainstream flavor category for eggs, tacos, chicken, pizza, soups, and snacks.