Mayonnaise is one of those pantry staples we can't seem to live without, whether we're slathering it on sandwiches or using it in deviled eggs. But with so many brands on the market—and just as many opinions about them—it begs the question: Is there truly a noticeable difference between mayo brands? For many celebrity chefs and home cooks, the answer is a resounding "yes." In our blind taste test of eight store-bought mayo brands, four stood out: Hellmann's, Duke's, Kewpie, and Sir Kensington's. Among these, Hellmann's and Duke's emerged as favorites for home cooks. When we asked five professional chefs...