The history of chocolate milk is fairly recent compared to that of cocoa, which as you know was originally used by the Maya, who introduced it in the Yucatan and then by the Toltecs who cultivated it in Mexico until they were conquered by the Aztecs who passed on all the knowledge on the plant and on the use of the extracted powder, which when mixed with water and other flavorings was used to give strength and vigor to the workers and soldiers. When Cortez brought the cacao in Europe was 1527, that is, the leader of the Conquistadores was aware of the plan already for eight years, because the Spanish they came into contact in 1519, to be precise during the 3rd journey to America except that at the time the drink, which for the Aztecs had a great value, so much so that they used it as a bargaining chip, actually had a terrible taste, so strong that Cortez all thought except to take it back. With time (eight years in fact there are many) he was able to soften the taste to the point of making such a tasty beverage to have all it takes to succeed in the courts and among European aristocrats. But like the milk chocolate they were born? In Switzerland in 1875, almost as soon as it spread the technology of the processing of milk powder which combined with the cocoa mass created a new solid food, in the form of chocolate bars.