Baked // Russian Zupfkuchen

Although this cake is called 'Russian chocolate cheesecake' it really is a typical German recipe. It's a very smooth cheesecake with a chocolate crust - it's delicious!
There are some ingredients that are hard to find outside Germany, e.g. quark. Here's a similar recipe that's made for North American ingredients ;)

Ingredients
for the crust
90g      sugar
100g    butter
200g    flour
40g      cacao
1          egg
2 tsp    baking powder

for the filling
180g   sugar
160g   butter
4         eggs
500g   quark
1 pkg  vanilla pudding powder
2 tsp    vanilla extract

Preheat oven to 350° Fahrenheit / 180° Celsius
Prepare the crust: mix sugar and butter. Add the other ingredients for the crust. Knead well.
Butter a springform pan and line it with about 1/2 - 3/4 of the chocolate dough.
Mix all the ingredients for the filling and pour the filling into the springform pan.
Pull little chunks of the remaining chocolate crust dough and randomly place them in the filling.
Bake for about 55 minutes.
Cool to room temperature, then refrigerate. Enjoy!