Take butter in a bowl and add sugar to it

Mix butter and sugar to form a creamy texture.

Add vanilla essence to it.

Then add flour and salt to it and mix

Add 1 tbsp of milk at a time and knead to form smooth dough.

Take half of the dough and mix cocoa powder to it and form chocolate dough.

Wrap the dough and keep in fridge for 15 minutes.

Then take the dough and roll them in the form of square

Cut them into three equal parts vertical or horizontal

Place chocolate and vanilla slabs alternatively

Wrap them and keep in fridge for 10 minutes.

Then take out and cut them into two or three equal parts.

Then place vanilla and chocolate strips alternatively to cut the shape of checkerboard. Place 3 strips to form 9 checks or 4 to form 12 checks.

Wrap it and keep in fridge for one hour.

After one hour, take the firm dough and cut them as slices.

Place the cookies in baking tray lined with parchment paper.

Preheat the oven at 180°C and bake in the same temperature for 20 minutes till it is done.

Serve the cookies with hot cup of Tea/Coffee