Start by whisking sugar and butter together.

Then whisk in the eggs, little by little. 

Mix the vanilla powder, flour, and baking powder together, and fold into the egg mixture.

Take a springform pan and grease it. 

Put the dough in the springform pan and bake the cake in the middle of the oven for 35-40 minutes at 180 degrees Celsius (356 degrees Fahrenheit). 

Let the cake cool down. 

Make a water bath to melt the chocolate, and spread the chocolate on the cake afterward.

Once the chocolate has hardened on the cake, it is ready to serve.