To make Chocolate Cocoa Milk, start by mixing unsweetened cocoa powder, sugar, and a pinch of salt in a bowl. Heat your preferred milk in a saucepan over medium heat, ensuring it doesn't boil. Gradually whisk the cocoa mixture into the hot milk until smooth. Add vanilla extract for extra flavor and adjust the sweetness to your liking. Serve in a mug, topped with whipped cream or marshmallows if desired. This delightful drink can be enjoyed hot or stored in the refrigerator for up to three days.