Preheat oven to 350 degrees F. Line baking sheets with silicone baking mats or parchment paper.

In a small bowl combine cocoa, baking soda, and salt. Whisk to combine and set aside.

Mix together butter, brown and white sugars until combined.

Add egg and vanilla and mix well. Scrape down the sides of the bowl.

Add cocoa mixture and mix until everything is well incorporated and there are no streaks of butter.

Stir in chocolate chips.

Using a cookie scoop, scoop dough onto the prepared baking sheet. Bake 9 - 11 minutes in a 350 degree oven. Remove from oven and let cool on pan 5 minutes before removing to a cooling rack to cool completely.