Make a mixture from the ingredients, pour it into a buttered and floured cake form. Bake covered in foil in a 356°F (180 °C) oven.
After 30 min, remove the foil for it to get a crisp. Take it out of the oven and leave it to cool. Prepare the topping.
For the topping.
Put all of the ingredients for the topping in a pot on low heat and stir until homogeneous. Pour this mixture over the cooled cake.