Pumpkin

Starbucks' Pumpkin Spice Latte contained no real pumpkin for 12 years after its 2003 debut — its flavor came only from cinnamon, nutmeg, and clove. Only after customer backlash did Starbucks add real kabocha pumpkin puree, about 2%, starting in 2015.

Ulleungdo Island's famous pumpkin taffy was originally 'hubak taffy.' Made from the hubak tree on the island, the name was mistakenly spread as 'pumpkin taffy' due to similar pronunciation. Ulleungdo seized this and began making actual pumpkin taffy.