You searched for: “lagniappe
lagniappe (LAHN yuhp, lahn YAHP) (s) (noun), lagniappes (pl)
1. An extra or unexpected small gift or benefit given by a merchant: The drugstore clerk gave Alisha a lagniappe of toothpaste and a toothbrush when she purchased the medication.
2. Something given or obtained gratuitously as a good measure: In addition to the book that Karl bought at the bookstore, he received a lagniappe of a calendar for the new year.

English speakers learned the word lagniappe from French-speaking Louisianians, who had adapted it from the American Spanish word la ñapa, "the gift".

It took a while for lagniappe to be used throughout the country, but by the mid-20th century, New Yorkers and those from New Orleans were familiar with this word.

—Based on information from Merriam-Webster dictionary and
The American Heritage Dictionary.