In a medium-sized saucepan over medium-high heat, melt the butter. Allow the butter to boil and then froth. Once the butter stops making popping noises, it is done. Remove from the heat. When you stir the melted butter, you should see some brown flecks.
Pour the melted butter into the bowl of a standing mixer, add the brown sugar and white sugar. Mix until combined.
Add the vanilla extract and eggs, stir until combined.
Pour the dry ingredients in. Flour, salt, cornstarch, baking soda. Stir on low speed until it comes together and looks like a dough.
Fold in the chocolate chips.
Remove the dough and wrap in plastic wrap. Place in the fridge to chill for 1-3 hours.
Preheat the oven to 350 degrees.
Remove the cookie dough from the fridge. Scoop the cookie dough out onto parchment paper-lined cookie sheets.
Place in the oven and bake for 9 minutes. Remove and allow the cookies to sit on the pan for 5-10 minutes before removing.
Remove and allow to fully cool or enjoy while hot.