Preheat oven to 375 degrees. Line baking sheets with parchment paper.
In the bowl of an electric mixer fitted with the paddle attachment, beat the butter until smooth. Add sugar and mix until light and fluffy.
Add eggs one at a time and mix until smooth on low or medium low.
With the mixer on low speed add cocoa powder. Scrape sides of bowl.
Add flour, coarse salt, and baking powder. Mix until just combined.
Add chocolate chips and mix until combined.
Portion dough to your desired size and follow baking times below.
For large, bakery sized cookies, portion dough into 5 oz balls, place on the prepared baking sheet and bake for 12-14 minutes. Makes about 10 cookies.
For medium (regular) regular sized cookies, use a #24 cookie scoop, portion dough, roll into a ball, and place on the prepared cookie sheet. Bake for 9-11 minutes. Makes about 22 cookies.
For mini sized cookies, use a #40 cookie scoop to portion the dough, and bake for 7-9 minutes.
*I like to roll the dough into a ball to give the cookies a smooth look.
Cookies look a little doughy, but they will continue to bake while sitting on the baking sheet.
Let cookies cool on baking sheet for 5-10 minutes. Remove and finish cooling on cooling rack.
Enjoy!