Ingredients: 

150 g of white sugar 

50 g of flour 

2 eggs

400 g of sour cream 

300 g of biscuits 

120 g of melted butter

10 g of vanilla sugar

Directions: 

1. Mix sugar and flour in a saucepan. 

2. Then add the eggs and stir well. 

3. Add sour cream too, then cook on the stove at medium heat. Stir until it thickens. 

4. Let cool at room temperature, the cover with some plastic wrap. 

5. Finely chop the biscuits and mix them with melted butter. 

6. Use this mixture to coat bottom and edges of a cake mold. Then place it in the fridge. 

7. Aside whisk butter and vanilla sugar, then stir in the custard you made before a little bit at a time. 

8. Fill the cake and level. 

9. Lastly cover with some more crumbled biscuits. 

10. Let it cool in the fridge for 5-6 hours before serving.