Preheat the oven to 375°F.
In a saucepan, melt butter over medium-high heat. Stir frequently until the butter is foamy. Keep stirring until the butter is brown and smells nutty.
Once browned, remove the butter from the heat and pour into a bowl to cool.
In a large bowl, whisk together flour, salt, baking powder, and baking soda. Set aside.
In a separate bowl, combine browned butter (slightly cooled), sugars, and vanilla. Mix on high for about 5 minutes. Scrape the sides of the bowl and add the egg and egg yolk. Mix on a medium speed for 2 minutes.
On a low speed, slowly add the dry ingredients and gently blend without overmixing.
Stir in the chocolate chips by hand.
Scoop out approximately 2 tablespoons of dough, roll it into a ball, and place it on a baking sheet lined with parchment paper.
Bake for 8-10 minutes. Allow to cool on a wire rack and enjoy!
