Preheat oven to 375F. Whisk together flour, baking soda, and salt and set aside.

Beat butter and gradually add in the sugars and the vanilla in a large bowl of an electric mixer fitted with a paddle attachment until well mixed.

Add eggs one at a time and continue to mix. Gradually add in the flour mixture, beating well after each addition. Fold in the chocolate chips.

Spray a 10 " cast iron pan with cooking spray and press cookie dough into the pan evenly. Bake for 40 min.. until the edges are crispy and the top is dark golden brown. If the cookie starts to brown too quickly lay a sheet of aluminum foil over the top.

Remove from the oven and let cool on a wire rack. Cut slices right out of the pan. You can top a slice with ice cream, whipped cream, and chocolate sauce for a dessert too!