. The short answer is because it's delicious. If you see something not so nice, please, report an inappropriate comment. You can find Mexican chocolate at most supermarkets. In short, it refers to a granular paste made out of cacao nibs, sugar, and cinnamon, with other spices like vanilla or nutmeg that amplify its complex and outstanding flavor. (BUY). This action aerates the milk which makes it frothy. We reserve the right to delete off-topic or inflammatory comments. Does a bowl of Reese's Puffs appeal to you? You may see some recipes online that call for cornstarch, but I don't recommend following them: In an attempt to make the recipe work for those who can't find masa harina or are too lazy to seek it out (at this point it's widely available in the States, and can be ordered online in those locations where it isn't easy to find), they've gone one step too far; cornstarch thickens but does not deliver any of the great corn flavor that makes atoles worth drinking.