Essential Concepts
Cream cheese frosting refrigeration is necessary: keep it at 40°F (4°C) or colder, and limit cumulative room-temperature time to two hours, or one hour above 90°F (32°C). See [how to store frosted cake](/how-to-store-frosted-cake/) and [how long cake can sit out](/how-long-can-cake-sit-out/) for related guidance.