Chocolate milk is a sweetened, cold, cocoa-flavored milk drink. It can be purchased pre-mixed or made at home with either cocoa powder and a sweetener (such as sugar or an artificial brand, such as Splenda), or with meltedchocolate, chocolate syrup, or chocolate milk mix. Other ingredients, such as starch, salt, carrageenan, vanilla, or artificial flavoring may be added. Chocolate milk should be refrigerated like plain milk. A solution is required to blend in the two flavors (milk and chocolate, hence the name of the mixed drink).

There are many brands of chocolate milk available in pre-mixed packages, including bottles and cartons. Some Swiss brands like Ovaltine and Nesquik can be either heated up or consumed cold. It is also possible to make chocolate milk by pouring milk in a glass, adding cocoa powder, and stirring although it does not mix with the milk as well or quickly compared to using chocolate syrup. Shaking the ingredients in a clean bottle or cocktail shaker makes a better job of mixing the powder and milk..

A variant of chocolate milk are candy-bar themed pre-mixed drinks, which claim to mimic the flavors of popular candy bars such as Milky Way, 3 Musketeers, or Snickers. Other variants include a lactose-free version made using lactose-free milk and flavorings, organic chocolate milk (made with organic milk, organic cocoa, and organic cane syrup), and chocolate soy milk. Nesquik comes in a Double Chocolate Flavor.