DS is 8 tomorrow and I had a cake ordered for him. Unfortunately the lady has had to cancel my order as she has COVID, so I'm now going to try to make one 
I am not a baker at all. I can cook dinners but don't have the patience to bake.
Please help me with a simple chocolate sponge recipe that I then plan to cover in chocolate fingers and m&ms to hide the imperfections. (I'm sure there will be many).
Should I make the sponge today, or would it be best to make it in the morning?
I've taken a half day from work to get ingredients/possibly start baking.
Hes had a tough time over the last 6 weeks so I really want to do the best I can for him and make something edible.