Grease a baking pan with oil. Take an oil paper on the base of the container.
Take 250 gm of salt at the bottom of baking container. Heat covered in low flame.

In a mixing bowl mix butter, oil and condensed milk. Mix with a whisker for 3 minutes or till air bubbles are visible.

Mix 6 tbsp boiling water with cocoa powder and whisk to avoid lumps. Keep aside.

Mix the warm cocoa liquid with the cake mixture and mix properly.

Mix some flour with chopped nuts and tutti-frutti and mix half with cake batter and half to decorate the chocolate cake.

Keep a stand on the salt of baking pan. Put the cake tin on the stand, cover the glass lid, and bake for 30 to 35 minutes in low/medium flame.

Check the cake by pricking a tooth pick. If it comes out clean then the cake is done. Cool down the cake, transfer it to a plate.