In a medium bowl, mix together flour, baking soda, baking powder, and salt. Set aside.

In a large bowl, beat together butter, white sugar, and brown sugar using a hand mixer or stand mixer. Alternatively use a hand whisk.

Add in vanilla and beat until totally smooth and creamy.

Add in eggs one at a time, blending until all combined.

Slowly add in flour mixture until all flour is blended into dough. Use a spatula to continue mixing.

Add in chopped up chocolate bars and chocolate chips. Stir until well combined.

Chill dough for at least 4 hours or overnight. 

Preheat oven to 375F and line baking sheet with parchment paper or nonstick spray.

Using a cookie scoop, scoop onto baking sheets. Bake for 9-11 minutes or until slightly golden.

Let cool for 5 minutes on sheets then move to cooling rack. Sprinkle with flakey salt.