What is "baker's chocolate"

n. Unsweetened chocolate mostly used for cooking.

Baker's Chocolate is a brand name for the line of baking chocolates owned by Mondelez International (formerly Kraft Foods). Products include a variety of bulk chocolates, including white and unsweetened, and sweetened coconut flakes. It is one of the largest national brands of chocolate in the United States. The company was originally named Walter Baker & Company.