The bakery is most famous for its peanut brittle and almond biscuits, but also sells beef jerky, ginger candy, egg rolls, and other pastries and snack products.
[2] Koi Kei was founded by Leoung Chan-Kuong, an immigrant from Foshan, China, who initially started selling peanut brittle and ginger candy on a pushcart in Macau.
[4] Leoung frequently crossed paths with triad gangsters, who sought to eliminate industry competition by setting fire to his shop.
In recent years there have been many cases where the Koi Kei trademark was being fraudulently used in mainland China and other places.
[7] In 2007, Hong Kong food critic Chua Lam filmed an advertisement for Koi Kei in Macau.