Preheat oven to 350 degrees.  Melt butter in microwavable bowl for about 50 seconds until it is just melted.  Do not overcook.  Its ok to see a few tiny chunks of butter.

Using your stand mixer or hand mixer, beat the sugars with the melted butter until well mixed and creamy.  

Add the egg and vanilla to the mixture and beat for about 10-15 seconds.  If an egg is beat too much, the cookie will not be as pillowy soft as we're going for here.

Add in the flour, baking soda and salt until a crumbly mixture forms.  Pat the dough together until it forms a ball.  If its greasy at first, this means you need to add a touch more flour.  I added an additional 4 tablespoons flour.  You want the dough to come apart easily.  It will feel drier than most doughs.

Add in the chocolate chips and chocolate pieces.  Work chocolate into dough ball with your hands.

Roll the dough into 9-10 large dough balls and place on baking sheet.  Allow enough room for each cookie spread as it cooks.  These are large cookies.

Cook for 9-11 minutes until they are pale in color, and puffy.  Remove from oven and let them sit on baking sheet for 30 minutes.  They are perfect after 30 minutes.  SO good.