BRAZILIAN CORNSTARCH COOKIE
OTHER NAMES: BISCOITOS DE MAIZENA
The term, Maizena, is the brand name for cornstarch in Brazil.  Cornstarch/corn flour first appeared by an Englishman named Orlando Jones, who received a patent from the US government in 1841 for his invention of cornstarch.  In the beginning, cornstarch was primarily used for starching laundry and industrial use until 1850. 
It wasn't clear when this recipe first begin, but it was very likely to be influenced by European cookie recipe, replacing flour with cornstarch. Just because there is no flour in this cookie, it can melt in your mouth! YUM!
cornstarch, granulated sugar, egg, pure vanilla extract, butter, salt
Potato Starch Cookie, very similar to the Cornstarch Cookie recipe, replaces cornstarch with potato starch.
Photo by gracefam