I'm very sorry because this is not an answer but the same thing happened to me except it was cornbread that caused it. I was actually searching for the cause when I came across this post.
a chocolate cake with chocolate icing and cover it in chocolate chips
Yes.
cover it with an aluminum foil
Cause they do
I use aluminum foil when i need to cover up left over food.
Take cover! = Deckung!
aluminum with a black plastic cover on the back...
You can buy chocolate cover fruit from sites such as those listed below this answer.
You kill a hedgehog. Cover it with Chocolate. Microwave for 10 mins. Et Voila.
Ashley Savage
10
I saw your question about the Hershey plate with the pix from the cover of their 1934 chocolate cookbook. Are you looking to buy one? I have one.