Add in the flour, baking soda, and salt; mix well.
Stir in the chocolate chips.
Spread cookie dough into 8 to 10-inch cast iron skillet.
Bake for 20-25 minutes, or until golden brown and center is set.
Notes
You want the center to be set, but be careful not to over bake. The cookie will continue to bake in the skillet after being removed from the oven. Store in an air-tight container.