Bake: Preheat oven to 180°C.
Steam: Bring water to boil in a steamer.

Place Dr. Oetker Nona Luxury Moist Cake Chocolate, water and eggs in a mixing bowl. Mix at high speed for 3 minutes.

Add in vegetable oil and mix at low speed for 1 minute or until batter is light and fluffy. Pour batter in a greased 20 cm round baking pan.

Bake: Bake at 180°C for 55 minutes. 
Steam: Steam for 55 minutes.

Melt cooking chocolate over a sauce pan. Pour in whipping cream, stir until well combined.

Slowly pour the chocolate ganache over the top and sides of the cake.

Melt white cooking chocolate over a sauce pan.

With a piping bag, pipe a spiral on top of the chocolate ganache and use a toothpick to draw cobwebs.