Add refined oil, sugar and yoghurt in a bowl ,mix it well.
Next add milk, baking powder, soda, sprig vanilla essence and give a mix.Keep it aside.
Now take the half portion of bater , mix the biscuit powder and coco powder and make smooth bater.
Next take a grease pan pour the bater and tap twice.
Next take another half portion of bater and add a pinch of orange food color and food essence.
After 45 minutrs check with toothpick and chocolate cake is ready.
Next bake orange cake for 45 minutes and when its done, check with toothpick.
Now take both the cake and cut the above part which is uneven.
Now apply sugar syrup and place one cake and apply chocolate frosting.
Next place another cake on the top apply chocolate frosting properly. Use a knife to make the smooth surface.Apply chocolate frosting in the corners also.
Now make rose petals from left cream of Oreo biscuits and decorate it with rainbow drops.
And your Double Layer chocolate orange cake is ready.