Preheat your oven to 375°F/ 190°C
With your stand mixer or hand mixer cream together the butter, brown sugar, and white sugar until light and creamy, about 3-5 minutes
Add in the egg, vanilla and salt, cream for an additional 2-3 minutes until light and fluffy, scrape down the sides if needed
Add in baking soda, and flour and mix until just combined, there can still be some flour-y bits
Add in the chocolate chunks and mix for just a few seconds until they are spread throughout
Using a scoop or spoon, scoop out your dozen cookies onto a sheet pan lined with parchment paper or a silicone baking mat. Make sure your cookies are separated about 2" apart
Sprinkle with some flaky salt then bake for 8-10 minutes. The cookies should be brown around the edges and lighter in the middle
Remove from the oven and transfer to a cooling rack. Enjoy!!