• Preheat oven to 350°F and grease a 9 or 10-inch cast iron skillet with melted butter or cooking spray.

Make cookie dough

• Add all-purpose flour, baking soda and salt into a medium bowl and whisk to combine.
• Add melted butter, brown sugar, ¼ cup plus two tablespoons white sugar, both eggs, and 1 teaspoon vanilla extract into a large bowl. Whisk for about one minute or it looks creamy and smooth.
• Add the combined dry ingredients and chocolate chips and mix with a wooden spoon until it is evenly combined.

Make cheesecake filling

• Add the cream cheese, remaining ¼ cup sugar, cornstarch, and remaining ½ teaspoon vanilla extract into a bowl. I used the same bowl that I used to mix the dry ingredients.
• Mix with a wooden spoon, until it has become smooth and creamy.

Assemble and Bake

• Evenly spread a little more than half of the cookie dough into the skillet. Next, layer all of the cheesecake filling on top. Finally, dollop the remaining cookie dough over the filling and gently spread it using the back of a spoon.
• Sprinkle additional chocolate chips on top, followed by a light dusting of salt.
• Bake for 33 to 37 minutes or the top looks deep golden brown.
• Place pan on a wire rack to cool and serve warm or at room temperature.