Beat butter and sugar until fluffy.
Add egg, egg yolk, and vanilla extract.
Beat in the cookie butter.
On low, add the dry ingredients.
Fold in the chocolate chunks
Chill the dough a few hours or overnight.
Preheat oven to 350°F cookie sheets with parchment.
Scoop balls of dough and bake 9-11 minutes.
Cool 5 mins on sheets and remove to a rack.