Chocolate cake and cream?
Or tell her, Try it, you'll love it!
I asked her about it, and it turns out it's not what she had in mind. I'm
sure she'll try it anyway, though.
I got some more information out of her, and it turns out that what she was
picturing was ordinary chocolate cake topped with custard, not cream! This
should be easy to do, once we get the custard part down pat.