From the archives, this corn on the cob was very popular in the Rio Grande Valley Texas where Man and I wintered for several years. He loves corn on the cob and he loves hot spices, and he really loved the combo. I googled Mexican corn on the cob and found that it is also known as elote.
According to the blog Homesick Texan, it’s a cob of corn "slathered in mayonnaise, cotija cheese (a semi-hard, crumbly cheese that resembles grated Parmesan), powdered chile peppers and lime juice. Sometimes, you can find it without mayonnaise and instead drenched in butter, margarine or crema."