Its Japanese. I buy it in a 2-pack from my local Costco. All the sushi restaurants in Seattle use it. Kewpie is a little different than American mayo, because it's made with only egg yolks—not whole eggs—and with rice or apple vinegar and no added salt or sugar. My cousin who went to culinary school in France and lives in Manchester swears by it too.hmm, never seen this Kewpie mayo before. Must be a west coast thing. Dukes fan myself.
How does one become a mayo expert exactly?