Hi, i wasnt sure where i was supposed to post this question so i apologise if its in the wrong place. I have been asked to make some birthday cakes for friends and family but they all need to be done for the same weekend. i have 6 to do some fri, sat, sun and mon. How long will a sponge stay fresh for if i make some early? is this possible? i want them to be as fresh as possible but still give me time to decorate them. please help! :/ thanks!