Brown the butter: Cut the butter into small pieces for even melting. Melt the butter in a wide stainless steel skillet over medium heat. Swirl the pan to prevent burning as it melts. Remove from heat when golden brown and let cool for 5-10 minutes.

Add the butter, sugars, and vanilla to an electric mixer bowl. Beat on medium high speed for 2-3 minutes.

Add the eggs and beat for 1-2 minutes until shiny and smooth.

Add the flour, baking soda, baking powder, and salt. Mix until just combined into a dense, shiny dough. Let the dough cool for 15-20 minutes.

Mix in the chocolate chips or chunks, then let the dough rest for another 20-30 minutes.

Preheat the oven to 350 degrees. Roll or scoop 3-tablespoon balls of cookie dough onto a baking sheet. Bake for 9 minutes until edges look cooked but the middles are still soft and puffy.

Remove from the oven and let the cookies rest for 15-20 minutes before serving to allow the middles to densify.