Baking ahead. How far in advance can this cake be made and kept until serving?

In the recipe headnote, the author A.) recounts her memories of seeing the cake in department store bakery departments and B.) that her version can be consumed over a week.

It's worth noting that this cake was invented before the widespread adoption of electric refrigerators.

That said it is probably at its peak quality a day or two after baking.

Best of luck.