From the NYT in an article titled, "Peanut Butter Takes On an Unlikely Best Friend":
LIKE Krazy and Ignatz, Carville and Matalin, Cupid and Psyche or Alison Krauss and Robert Plant, the peanut butter and pickle sandwich is one of those unlikely pairings that shouldn’t work, but does.
The PB&P has been a minority enthusiasm in America for generations, lingering just under the radar. The sandwiches appeared on lunch-counter menus during the Great Depression and in extension-service cookbooks in the 1930s and ’40s in recipes that generally called for a few spoonfuls of pickle relish. A lot of people’s grandmothers used to eat them.
These days, they’re a cult item. Kinsey Millhone, the fictional private investigator in Sue Grafton’s alphabet series of mysteries, is probably America’s best-known devotee.
Below that, there’s a consistent but low-level Internet buzz about the combination, just as there is about the other unlikely things people like to marry with peanut butter and place between bread slices: mayonnaise, olives, thick onion slices (this was Hemingway’s favorite sandwich), horseradish, bacon, Marmite (in England) and Vegemite (in Australia), to name but a few.
Read the whole thing for yourself here: http://www.nytimes.com/2012/10/24/din...