What is Chocolate ?
Chocolate is (noun) 1. a sweet brown food made from the crushed seeds of a tropical tree Can I buy a bar of chocolate? Her mother made a chocolate cake. 2. a single sweet made from chocolate There are only three chocolates left in the box. Who’s eaten the last chocolate? 3. a drink made from chocolate powder and milk I always have a cup of hot chocolate before I go to bed. 4. a dark brown colour, like chocolate We have a chocolate-coloured carpet in the sitting room. (NOTE: no plural, except for meaning 2)
source: Easier English, Student Dictionary Upper Intermediate Level