Cut the chocolate bar into small pieces.
Add butter in chunks. Place in a water bath.
In another bowl, combine flour and baking powder.
Beat eggs separately.
Add sugar and coffee to melted chocolate.
Add eggs and stir.
Then add the flour and baking powder. Mix everything well until smooth.
Grease the mold with butter. Pour the dough and spread over the entire pan. Drink in the oven for 20-25 minutes at a temperature of 190 degrees C. Check the readiness with a never stick.
Remove the finished cake from the mold and let cool.
Mix cocoa powder with powdered sugar and water.
Mix well and use a spoon to scribble the pattern all over the cake.
Let dry and cut the cookies into pieces. Place on a platter and serve warm.