This means that it is a lot more shelf-stable than regular buttercream frosted cakes are. So, at room temperature, a fondant cake can sit for roughly 3 to 4 days.
When storing a fondant cake at room temperature, you will have to cover it with a protective layer. We always recommend investing in a large cake carrier.
Now usually, you shouldn’t store a fondant cake in the fridge. One of two things can happen. The fondant could either dry out completely or it can absorb the moisture in the fridge and start becoming sticky.
Freezing a fondant cake will extend its shelf life to potentially a year! But, you have to ensure that it is frozen and protect it from freezer burn. Otherwise, it will never last.
As you can see, there are many answers to how long can a fondant cake sit out. However, on average we recommend eating it within 3 days.
Find out more tips and tricks in the link below.
How Long Can A Fondant Cake Sit Out? Best 3 Ways To Store