If I order a cake that I need for the next day will they have it ready?

I think your best bet is to call the location.

They don't do cakes

Theres No Bajery at Business Costco.

Yes

I've ordered a cake the day before and they had it ready for me on time. I think it was a little less than 24 hrs based on the time of my order.

At other costco

One day is available at Costco.