Take a bowl add melted chocolate (it's optional) wheat flour, cocoa powder, baking soda, baking powder, sugar & mix it well.

Now add milk & make a smooth batter.

Preheat your pan or kadhai for 10 minutes on medium flame.

Take a cake mould grease it with oil and put butter paper in it and grease again with oil. Now transfer your batter into the mould.

Now, bake it for 30 to 35 minutes for the low flame.