Chocolate Cake Sponge

Tried Chocolate sponge for first time. It came out quite well. Sharing the recipe.

All purpose flour 1.25 cup + for dusting
Cocoa powder 1/4 cup
Oil 1/2 cup + for greasing
Powdered Sugar 1 cup
Thick Curd 200gm
Chocolate Essence 3 drops
Baking powder 1 tspn
Baking soda 1 tspn
Milk as needed

Sieve apf n cocoa powder in a bowl.
Mix sugar n curd in another big bowl.
Preheat oven at 180 degree for 10 mins.
Now grease the mould with oil. Dust some apf.
Now add baking powder n baking soda in curd.
Start adding apf n coco powder + oil slowly. (Add small quantity of flour then lil oil, mix well with curd so that no lumps are formed. Repeat with all quantity)
Add essence. Add milk if batter is not of flowing consistency.
Pour in greased mould.
Bake for 25 mins approx. Chk if done with toothpick or knife. If comes out clean then its done. Or if batter still sticks on knife then bake for 5 more mins.