You should not keep a cake out at room temperature for more than one hour if the icing contains cream cheese or whipped cream (even stabilized whipped cream). Instead, wrap it tightly in plastic wrap and place it in the refrigerator for up to three days to keep it fresh.
How long does whipped cream last in a cake?
Simply wrapping the cake in plastic wrap and storing it at room temperature is the most efficient approach to keep it fresh for a day or two longer. Wait until just before serving time to freeze the dish in order to avoid any potential food safety issues. The whipping cream will be light, airy, and beautiful, just the way it should be, thanks to this technique.