These are sometimes referred to as "cocoa nibs." They are fragments or pieces of broken cocoa beans, roasted and then crushed into smaller pieces of cocoa.
Crushed cocoa beans allow you to add crunch to your favorite culinary preparations and recipes. They add an intense and somewhat bitter or unsweetened taste (without being truly made of chocolate). The cocoa nibs provide a boost to savory and salty meals or an added seasoning to sweet pastries. Various uses in savory or sweet recipes can be developed using your creativity (for example, a crunchy breading for meat or fish dishes, ravioli flavoring or including it in the preparation of soft chocolate, flat cookies or "tiles," financier or sponge cakes, crumbles or cookies).