First beat butter.

Then add brown sugar and beat.

Now add white sugar and beat.

When the sugar and butter have been mixed well add egg and beat till mixture is smooth.

Add vanilla essence.

Now add dry ingredients flour, baking soda and salt in three steps.

Mix at each step.

Keep on beating till mixed well.

Now add chocolate chips.

Put in fridge for 25 minutes.

Now to bake take mixture in tablespoon one by one.

Make small balls.

Bake at 180 c for 10 to 12 minutes.

Allow to cool after taking out from oven.