Preheat oven to 350°F and line a baking sheet with parchment paper.
Place butter in the bowl of a stand mixer and mix on high until light and fluffy.
Add in the sugar and mix until full combined. You may need to scrap down the sides and bottom of the bowl.
Add in the vanilla, eggs, and espresso powder, if using, and mix until combined. Mixture will look really wet.
Turn the mixture to low and add in the flour ½ cup at a time then add the cocoa powder.
Turn the mixer up to medium speed and add in the baking powder and salt. Make sure to scrape the sides and bottoms.
Mix in the chocolate chips.
Scoop the cookie dough and form into 1-inch balls. Place on prepared cookie sheet.
Bake for 9-10 minutes*
Remove from oven and enjoy!
Notes
Lisa’s Tips
*I like to cube my butter so it’s easier/faster for the mixer to whip up. * Using a chopped-up chocolate bar in lieu of 1 cup of chocolate chips gives a nice melty chocolate cookie. *I like to pull the cookies out slightly underdone- closer to 9 minutes- which helps them stay softer and chewier.