Whisk together the first 5 dry ingredients.
In a mixer, beat butter and 2 sugars until fluffy.
Add egg and yolks.
Add vanilla until blended.
Add dry ingredients.
Fold in chips.
Chill covered for 48 hours.
Preheat oven to 350 degrees F.
Line cookie sheets with parchment paper.
Scoop dough by large tablespoons and gently press down on tops.
Bake 10 minutes.
Enjoy!