Preheat oven to 350° F.
In a large bowl, combine butter, brown sugar, and granulated sugar.
Add vanilla and eggs and stir to combine
Add baking soda, salt, and flour and stir until everything is incorporated.
Fold in chocolate chunks.
Divide dough in half and form into a ball. Press down slightly in the center of the ball to create raised outer edges. (This will prevent the cookie from swelling up and deflating as it cools.)
Set into a parchment-lined 8x8-inch baking dish, baking one giant cookie at a time.
Bake for 25-30 minutes or until the top is golden brown. The edges do need to be golden brown, if they are not that means the center is still uncooked.