Preheat oven to 350° and prep a cookie sheet with non stick spray or parchment paper
Melt butter and let cool (you don't want this hot)
Mix together cooled/melted butter, egg yolk, both sugars, and vanilla until fully combined
Sprinkle flour, baking soda, and salt over top using a rubber spatula until combined
Add in chocolate chips and press in with spatula until evenly combined in the dough
Roll dough into 6-8 balls and place on prepared cookie sheet. Do not flatten them
Bake 10-12 minutes or until edges are golden. The middle will look almost done
Let cool and enjoy!
