1 cup milk
1 (1 ounce) envelope instant hot cocoa mix (such as Swiss Miss®)
1/4 cup orange juice
1/8 teaspoon ground cinnamon
Heat milk in a saucepan over high heat; whisk hot cocoa mix into milk until completely dissolved. Continue whisking for 1 minute, reduce heat to medium, and gradually stir in orange juice. Sprinkle cinnamon over the top and stir. Pour hot chocolate into a mug.