(request) Help! Looking for recipe for German gooey chocolate cake with crust

Hi guys,

I lived in Berlin for a time and there was a restaurant that had this ultra-dense, almost gooey chocolate cake with a crust and a layer of slightly harder chocolate covering the whole thing. The crust was deeper brown than a normal pie crust, and tasted kind of like caramelised shortbread. As a whole, it's unbelievably good.

In pictures I've found, it says the cake is made with nougat and schmand (like sour cream but higher fat, http://ift.tt/2zn5gne)

Here's some images of the cake I've found around the internet: http://ift.tt/2BI7J1e http://ift.tt/2zn5iLS

Does anyone have any ideas where to start? Know of a recipe similar?

Cake: Black Magic Shop: KuchenRausch -- Simon-Dach-Straße 1, 10245 Berlin

bon appetit