Preheat oven to 175C (350F).
Add the butter and sugars in a large bowl and mix together with a spatula.
Add in the eggs and natural vanilla extract and mix together.
. Shift in the flour, baking soda, and salt.
Add in the chocolate chips.
Transfer to a 8-inch cast-iron skillet
Put in the oven and bake for 18-20 minutes or until chocolate chip cookie is golden brown,
Cool and enjoy!!