Preheat oven to 375.
Using a stand mixer with a paddle attachment, cream butter and sugar together on low speed for about 2-3 minutes.
While butter & sugar are creaming, use a separate bowl and lightly whisk the flour, baking soda, baking powder, and salt together. Set aside.
Scrape the sides of the bowl with the butter & sugar. Mix in egg + yolk & vanilla, just until combined.
Gradually add in the flour mixture to the wet ingredients until fully combined.
Roll into dough balls, roll dough balls into sugar, and set them on the pan until you've got your traditional dozen on the pan.
Bake for 8 minutes at 375.
Remove from oven, allow to cool on the pan for a couple of minutes, and then remove from the pan onto a cooling rack.
Repeat with remaining dough for another 12 cookies.