Preheat oven to 350˚ F. Line a baking sheet with parchment or Silpat liner.

In the bowl of a stand mixer with paddle attachment, combine 2 sticks of butter, 1 cup of packed brown sugar and 1/2 cup of white sugar.
Beat 5 minutes on medium/high speed until creamy and light, scraping down the bowl as needed.

Add 2 eggs, one at a time, beating well with each addition, scraping down the bowl as needed, then beat in 2 tsp of vanilla.

In a separate bowl, combine 3 cups of flour, 1 tsp salt, 1 tsp baking powder and 1 tsp of baking soda (sifted to eliminate lumps).
Add the flour mixture to the creamed butter in thirds, mixing to incorporate with each addition. 
Fold in 2 cups of chocolate chips. (I add chopped walnuts to half of the dough because hubby loves them.)