In a medium bowl, sift the flour, cocoa powder, baking soda, and salt. Set aside.
2 1/4 cups All-purpose flour, 1/2 cup Unsweetened cocoa powder, 1 tsp Baking soda, 1 tsp Salt
Using a mixer in a large bowl, beat the butter, brown sugar, and sugar on high speed for 2 minutes. It will be pale and fluffy.
1 cup Unsalted butter, 1 1/4 cups Brown sugar, 1/4 cup White granulated sugar
Add in the vanilla and eggs. Beat on high speed until combined. Add in the dry ingredients and mix on low speed until combined.
1 tsp Pure vanilla extract, 2 Large eggs
Add in the chocolate chips and mix on low until just combined.
1 1/2 cups Semisweet chocolate chips
Preheat the oven to 350℉. Line two cookie sheets with parchment paper. Let the cookie dough rest for 10 minutes to prevent spreading.
Use a large cookie scoop (2 oz or 2 tablespoons) to scoop the cookie dough. Place 6 cookie dough balls per cookie sheet.
Bake for 11-13 minutes. Bake until the edges are set and the middle is underdone.
Let the cookies sit on the hot pan for 5 minutes before transferring to a cooling rack. Cool completely before topping.