Preheat the oven to 350 degrees.
Prepare the cookie sheets with parchment paper.
In a medium mixing bowl, combine flour, baking soda and salt.
In the bowl of an electric stand mixer, beat butter and brown sugar on medium speed.
Add in the eggs one at a time and blend.
Pour in the vanilla and the espresso powder.
Scrape the bottom and sides of the bowl.
Turn the mixer to low and gradually add in the flour mix.
Mix until combined and then pour in the chocolate chips and fold them into the batter.
Refrigerate the dough for 30 minutes.
Using a cookie scooper, scoop 1 1/2" balls onto the cookie sheet. I like to do 6 at a time on one sheet. You can fit 6 if you like.
Bake for 9 minutes. Remember baking times vary, might need 10 or 11 minutes.
Let the cookies rest for 15 to 30 minutes before eating them.