what candy bar was originally introduced as “rowntree’s chocolate crisp”?

The Kit Kat® candy bar, introduced as “KIT KAT®” in the U.S. in 2015, was first released as a chocolate crisp known as “rowntrees” in 1935 and is now made by Hershey Company for Mondelēz International.

Originating from England before World War II, it was imported to Canada and the United States during the early 1950s where it continued to be manufactured until its ‘re-invention’ more than 60 years later.