Preheat the oven to 375 degrees.
Slice the cold butter into tablespoons and place it in a mixer. Add both sugars and mix until fully incorporated and light and fluffy - about two minutes.
Add eggs and beat two more minutes, scraping down bowl if needed.
In a separate bowl, whisk baking powder, baking soda, and coarse salt into the flour.
Add dry ingredients all at once and mix just until incorporated. Do not overmix. Dough should be fairly thick. If it seems very sticky you can add a little more flour.
Pour in chocolate chips and mix just until incorporated.
Scoop out cookies using a 3 TABLESPOON SCOOP onto a lined cookie sheet. Your cookie dough should still feel quite cool to the touch. If it doesn't, pop the cookie sheet into the fridge for 8-10 minutes before baking.
Bake at 375 for about 8-9 minutes. Cookies should feel set on the edges but will still be soft in the middle and pale in color. Allow cookies to rest on the baking sheet for 2-3 minutes before removing to a wire rack to cool.