Is hot chocolate a mixture or compound?

A compound is a substance that contains two or more elements chemically combined in fixed proportions by mass. A mixture is a physical combination of two or more substances that are not chemically combined.

Hot chocolate is made by mixing cocoa powder, sugar, and milk. The cocoa powder and sugar are solids, and the milk is a liquid. When the cocoa powder and sugar are mixed with the milk, they do not chemically react with each other. They simply dissolve in the milk. Therefore, hot chocolate is a mixture.