It seems like Blue Plate Mayonnaise is a Southern Thing. Who would have thunk it (is that actually a word)?
My youngest daughter, Katie-Beth, lives in New York City. She assures me that there is NO Blue Plate Mayonnaise in New York City.
IF there were, she would find it. That, and Zatarain's New Orleans Traditional Creole Seasoning; which is why she calls her mama when her cupboard is bare.
Mama, living in Southern Louisiana, has an abundant supply at hand, and is all too willing to stock that empty cupboard for her little girl. So, when we drive up in June, there will be a six month supply of Blue Plate Mayonnaise and Zatarain's delivered to her doorstep, along with about that much gulf shrimp. So, clear the highways and the by-ways, because South Louisiana is heading to the city with Southern supplies in tow.
This only goes to prove that you can the Cajun girl out of South Louisiana, but you can't take the Cajun out of the girl.