In a mixing bowl start pouring oil , sugar , yoghurt and vanilaa essence. Mix very well to make a smooth texture.
Sieve flour , coco powder , baking powder and soda thrice. Mix dry ingredient into wet mixture laddle by laddle and combine.
Incorporate together very well and mix milk slowly to make a smooth bater.
Grease the tin with butter and sprinkle some coco powder and dust all the corners. Preheat the oven for 10 minutes in 180° C.
Pour the bater and tap twice. Place the tin in oven and bake the cake for 35 to 40 minutes. Check when done with toothpick. Allow the cake to cool completely and demould the cake.
Now place the cake on plate and apply melted chocolate all over the cake. Refrigerate it for 30 minutes. Now take the cake out and decorate with gemes chocolate.
Slice the cake and serve.