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... It's been 125 years since the first known written recipe, and the PB&J concept is still going strong.

In its simplest form, it's a lunchbox staple, but it's also a jumping-off point for creative takes in eateries from delis to high-end restaurants.

It's nothing if not versatile: When peanut allergies led to school bans, alternative nut butters like almond and seed butters like sunflower, flaxseed and pumpkin seed stepped in.

The combo began as a tea sandwich for the wealthy

The recipe that appeared in 1901 in The Boston Cooking School Magazine was written by Julia Davis Chandler.

It called for currant or crab-apple jelly and was viewed as a fancy tea-time snack for wealthy people.

In the 1920s and 30s, commercial peanut butter and machine-sliced bread became widely available. Peter Pan and Skippy were early brands, and then Jif came along in the 1950s. ...