Choco chip cookies : Diwali celebrations

All purpse flour - 2 cups
Brown sugar - 1 1/4 cups
Coco powder - 4 tbsp
Cooking chocolate - 1/4 cup
Egg - 2 
Butter - 100 g
Vanilla essence - 1 tsp
Baking soda - 1 tsp
Salt - 1/2 tsp
Granulated sugar - for dusting 

Method - 

1. Beat butter and sugar together until creamy.
2. Add eggs and vanilla essence and mix until combined .
3. In a large plate sift the flour , baking soda and salt.
4. In a small saucepan  melt the chocolate with little milk
    (4-5 tbsp).
5. Add the melted chocolate  and cocoa powder to the butter
    sugar mix.
6. Gradually add the flour in the mixture and continue
    mixing until incorporated well.
7. Divide it into  two portions and shape it into a disc, 
    wrap  a cling film around it.
8. Refrigerate it for 3 hours until thoroughly chilled
9. Apply little oil on your palms, make round cookies of
    1 1/2 inch thickness, flatten a bit with your palms, 
    sprinkle granulated sugar on each cookie.
10 Line a baking tray with parchment or foil paper, arrange 
     some cookies on it and bake it until all the cookies are 
     perfectly baked.    
11. Homemade, perfectly baked yummy cookies are ready, 
     let it come to room temperature. 
12. Store in an airtight container. You can gift this homemade                  cookies to your friends in a hamper on diwali or serve this                yummy cookies whenever someone is felling hungry :-))))