Chocolate chips cookie

Sigh, today was the last day of the Christmas break:( I'm totally not ready for school yet, none of my homework was done and I haven't started revisions for the exam. At the time, I guess only cookies could cheer me up a bit :D !
Chocolate chips cookie Recipe(make 2dozens, depends on size)
3/4c butter
3/4c unpacked brown sugar
1/4c sugar
1 egg
2tsp vanilla
2c flour
2tsp cornstarch
1tsp baking soda
1/2tsp salt
1/2c chocolate chips(add more if u want)
1) beat together butter and sugar until light and creamy. Add in egg and vanilla, beat until mixture is combined.
2) combine flour, cornstarch, baking soda and salt in a separate bowl, then add to the butter mixture, mix together with a wooden spoon. Add chocolate chips.
3) bake them in 350F preheated oven for 8-10mins (DO NOT OVER BAKED)