4.2.3. Conching
Chocolate processing involves re-distribution of cocoa butter
and fat phase substances from dry cocoa through surface scrapping,
agitation and frictional heat, favoring release of volatiles,
acids and oxidation for flavor development. Air flows through conche
removing impurities, moisture and some volatiles. Controlled
temperature used throughout the processing varies apropos to
type of chocolate prepared (49 C for milk chocolates-82 C for
dark ones). Partial caramelized flavor developed due to elevated
temperature and Maillard reaction (milk chocolate) may accompany
PAHs formation in chocolates (Kumari, Chaturvedi, Ansari,
Murthy, & Patel, 2012).