Does anyone know if I can make the kitty litter cake a day ahead of time?
I'm not sure if it will to soggy by tomarrow night. TIA

I wish I could help but I don't know what a kitty litter cake is. Maybe someone else will see it and reply.

Here's a variation of your recipe which uses cake layers filled with pudding:

http://www.fabulousfoods.com/recipes/dessert/cakes/kittylittercake.html

HTH

You sure can, but it has to be refrigerated! Cover with foil and not saran wrap, less condensation.