Preheat the oven to 350°F.
In a medium bowl, cream the butter, brown sugar, white sugar, vanilla together. Add in the eggs and additional egg yolk and mix to combine.
In a separate bowl, toss the dry ingredients together, and add to the butter mixture. Mix to combine.
Using a cookie scoop, place cookie dough onto a cookie sheet 2 inches apart from each other. Top with dusting sugar if desired.
Bake in the preheated oven for 10-12 minutes or until the dough is no longer shiny.
Let cool for 10 minutes before serving.
