What should be done with sheet cakes for optimal storage?

Keeping sheet cakes uncut is recommended for optimal storage because this helps retain moisture and freshness. When a cake is cut, the exposed edges can dry out more quickly, diminishing the texture and flavor of the cake. By storing the cake whole, you allow it to stay moister for a longer period, and if properly wrapped, it can maintain its quality until you are ready to serve it.

This method also allows for better preservation of the cake’s structure and prevents any potential contamination from external sources. Additionally, if the cake is frosted, the intact surface can help protect the frosting from damage that could occur when it's cut into pieces.

Storing the cake uncut also gives the baker flexibility in serving portions as needed, whether it's for immediate consumption or for a later date.