Firstly in a blending jar, add egg, oil, sugar, cocoa powder & coffee. Blend everything for about 10 secs. Then remove the batter into a large bowl.

Now over a strainer, add maida, baking powder and sieve it. Mix everything very gently by fold & cut method. Donot whisk it hard.

Then gradually add milk to it and combine everything very well to get a consistency as shown in image 3 below.

Now add chocolate essence and again give it a mix. You can also add vanilla essence if you don't have chocolate essence. Then finally add some choco-chips & mix everything well.

Now for pre-heating, take a kadai for pre-heating with it's base covered with salt and a stand over it. I have kept another stand, as I don't have any muffin tray, all together. But if you have a muffin tray, you can avoid the second stand. Now cover it and pre-heat the kadai for 3 mins on high flame and then 4 mins. on medium flame.

Now I took the muffin moulds and placed muffin paper over them. Then add 2 tbsp of cake batter in each mould. If you have a muffin tray or a small tray, then you can add only 1 and half tbsp of batter into it.

Sprinkle some choco-chips over it. Then after 7 mins place the muffin moulds over the tray. Cover it immediately and bake it on a low flame for 25 to 30 mins.

After 30 mins, check it by inserting a toothpick. If it comes out clean, then your cake is done. Now switch off the flame. Let them come to room temperature then you can demould the muffins and serve them.