I recently ate one of these in a restaurant in Gran Canaria - they didn't have a menu, you just pointed at things on a trolley. I loved it and asked what the name was but we couldn't quite communicate. I assume it's a Spanish dessert as it was a small, local-ish restaurant, but it might not be.
The bottom layer is some sort of dark caramel sauce, then there seems to be perhaps crumbled biscuits, then on top is what I think is Chantilly cream? It's quite a thick cream.
I'd like to try making the dessert myself, but Googling these things together hasn't come up with anything useful.