Preheat the oven to 350° F.
In the bowl of a stand mixer, cream together the butter and sugars until smooth, light in color and fluffy. This will take a few mintues.
Scrape the sides of the bowl and mix in the egg and cake batter flavoring.
Once completely combined, stop the mixer and add in the flour, baking soda and salt. Mix until combined.
Once the dry ingredients are mixed in, add in the chocolate chips and mix until thoroughly distributed.
Divide the cookie dough into 5 equal parts (each portion was 244g for me). Roll into a ball and then flatten slightly and arrange on a parchment lined cookie sheet. The cookies will spread so unless you have a 3/4 sheet, I would bake on two separate half sheets. (the photos in this post show a 3/4 sheet).
Bake at 350° F for 14-16 minutes, until the cookies spread, the edges start to crackle and the center no longer looks wet.
Remove from the oven and allow the cookies to cool completely on the pan.once the cookies have cooled completely, make the frosting.