Chocolate

 

 Chocolate is a food made from roasted and ground cacao seed kernels that is available as a liquid, solid,        or paste, either on its own or as a flavoring agent in other foods. Cacao has been consumed in some form        since at least the Olmec civilization (19th–11th century) and the majority of Mesoamerican people,                    the Maya and Aztecs, made chocolate beverages.

In a study, which has been published in the journal ACS Applied Materials and Interfaces, the Leeds researchers explained that when those bites of chocolate hit our tongue, a “fatty film” — their words — is released into our mouths, providing an irresistibly smooth sensation as we chew.