Preheat your oven to 350°F. Line a cookie sheet with parchment paper and set aside.
Whisk together the dry ingredients, ensuring the cocoa isn't lumpy and is well-mixed in.
In your mixing bowl, cream the butter and sugars together until light-colored and fluffy.
Add in the eggs one at at time, beating them in completely. Add in the vanilla and mix in well.
Slowly add in the dry mixture little by little, until it has all been added and mixed in thoroughly.
Mix in the chocolate chips until they are evenly distributed throughout the batter.
Drop by rounded tablespoon onto the prepared cookie sheets.
Bake in the preheated oven for 9-10 minutes until the edges are firm and the middle has just set. Do not overbake! Remove and cool on the sheet for a few minutes.
After cooling on the sheets, remove the cookies onto a rack to cool completely.
Notes
Feel free to add in another type of chocolate chip to play around with the flavor!