Yes! Store leftover hot chocolate in the refrigerator in a sealed container for up to 4 days. To reheat on the stovetop add hot chocolate to a saucepan and slowly heat over medium heat until warmed through. Hot chocolate can also be warmed in the microwave. Add to a microwave-safe mug and heat in 30-second increments until it's warmed. Heating time will vary depending on the power of the microwave.