Combine the Ingredients. In a large bowl, whisk together the cocoa powder, granulated sugar, powdered milk, cornstarch, and salt until everything is well-blended and smooth. If you’re adding any optional flavors like cinnamon or vanilla powder, mix those in as well.
Store Your Mix. Transfer the mix to an airtight container. Mason jars are perfect for this and make it easy to scoop whenever you’re ready for a mug of hot chocolate!
Make a Cup of Hot Chocolate. To prepare, add 2-3 tablespoons of the mix to a mug. Pour in 1 cup of hot water or warm milk for a creamier drink. Stir until the mix is completely dissolved, and top with marshmallows or whipped cream if desired.