Melt the butter in the microwave or in a water bath, and then add 200 grams of chopped dark chocolate.

Stir until it becomes a liquid mass.

Add then sugar, eggs, and vanilla sugar (in that order!).

Stir everything well together.

Then mix the cocoa with the flour, and add it to the mixture.

Stir it well, along with 2 tablespoons of water.

Add the batter to a lined baking tray, then place it in the oven at 180 degrees Celsius (356 degrees Fahrenheit) for 25 minutes (convection).

After 25 minutes, take the cake out and decorate with the remaining dark chocolate, marshmallows, and peanuts.

Put it back in the oven for 5 more minutes, until the marshmallows turn golden.

Finally, decorate with fresh marshmallows and caramel sauce.