Ingredients
Method
- **Brown.** Melt butter in a saucepan over medium heat. Cook 5 minutes, swirling, until amber and nutty smelling. Pour into a heatproof bowl and cool 15 minutes.
- **Heat.** Preheat oven to 350F with a 10 inch cast iron skillet inside.
- **Mix.** Whisk cooled brown butter with brown sugar and granulated sugar 2 minutes until glossy. Add egg, yolk, and vanilla. Whisk smooth.
- **Combine.** Add flour, baking soda, and salt. Stir until just combined. Fold in chocolate chips and chopped chocolate.
- **Spread.** Carefully remove hot skillet from oven. Spread dough evenly into the pan. Sprinkle flaky salt on top.
- **Bake.** Bake 22 to 25 minutes until edges are deep golden but center looks raw and shiny.
- **Serve.** Cool 5 minutes. Top with scoops of vanilla ice cream and serve straight from the skillet with spoons.
Notes
Brown the butter and let it cool to room temp before mixing. Hot butter melts the sugar and changes the texture. Use a 10 inch cast iron skillet for the right thickness. Larger pans bake the cookie too thin. Underbake by 4 minutes. The skillet keeps cooking the cookie after it comes out.
