Im getting ready to make a cookie cake can someone give me a way to bake the cake a day r

so before I decorate and keep it moist I keep thinking im delivering on Friday am and she is not using until Saturday help please

Hi - ive baked a giant chocolate chip cookie lots of times. I wouldn't consider this a cake, so not sure if its the same you are talking about - I've done it and the cookie still tasted great a few days later so it should be okay.  This was just a chocolate chip cookie made into a 10inch round.