Preheat oven to 375 degrees F. Line a baking sheet with parchment paper.
Using a mixer, cream together the sugars and butter, about 3-5 minutes.
Add 1 whole egg and mix well. Add one egg yolk mixing in, then repeat with other.
Add in vanilla and mix in.
Using mixer on low speed, add in the baking powder, soda, and salt until well combined.
Add flour and mix in until just combined, about 30 seconds to 1 minute. Do not overmix! (Dough will be sticky.)
Using wooden spoon, fold in chocolate.
Using a large cookie scoop, scoop and place cookie dough balls onto the cookie sheet, 6 per baking pan. These spread out alot!
Bake for 12-13 minutes or until edges are slightly brown.
Leave cookies on the cookie sheet 5 minutes before transferring to wire racks to cool completely.
Enjoy with a large glass of cold milk!