Make brown butter
Pour chilled butter into bown. Add brown sugar, sugar and whisk for 4-5 minutes.
Add eggs and egg yolk and beat. Stir in vanilla.
Add flour, baking soda, and Salt. Stir, don't overmix.
Stir in chocolate chips.
If possible, let dough chill for 24-48 hours
Preheat oven to 385. Bake for 9-10 minutes.