Preheat oven to 350°F. In a stand mixer with a paddle, cream together the brown butter, sugar, brown sugar, vanilla, and salt until smooth and fluffy. In a separate bowl, whisk the flour and baking soda together. Add this to the butter/sugar mixture. Stir in chocolate chips.
Using a scale, weigh out 6-7 oz portions onto a sheet pan. Spray small cast-iron pans very well and push the scoops into the pan as evenly as possible
Place skillets evenly on a parchment-lined sheet pan and place it in the middle of the oven. Bake for 12 minutes, rotate and bake for another 10-12 minutes until the center is done.
Serve warm with your favorite ice cream and caramel sauce.