Preheat oven to 375 degrees and line cookie sheets with parchment.
Heat 10 tablespoons butter in a skillet over medium-high heat until melted, about 2 minutes. Continue cooking and swirling pan to brown the butter. It should smell nutty.
Remove from heat and pour into a heat safe bowl.
Stir in remaining 4 tablespoons butter (cubed) until completely melted.
Add both sugars, salt, and vanilla to bowl with butter and whisk until fully incorporated.
Add egg and yolk and whisk smooth.
Let mixture stand 3 minutes, then whisk for 30 seconds.
Repeat this process of resting for 3 mins and whisking 2 more times until mixture is thick, smooth, and shiny.
Fold in flour and baking soda.
Stir in chips.
Chill dough 30 mins (at least) and scoop with a 3T. scooper.
Bake 10-13 mins and cool on sheet pan.