
Preheat oven to 350F (175C) and line cookie sheets with parchment paper, set aside.
In a large microwave-safe bowl, heat butter in 15-20 second increments (stirring in between) until butter is melted.
Immediately add cocoa powder and whisk to combine. Allow to cool until no longer warm to the touch (this usually only takes a few minutes after adding the cocoa, the mixture shouldn’t be warm or it could end up melting your sugar).
Add sugars and stir to combine.
Stir in eggs and vanilla extract.
In a separate, medium-sized mixing bowl whisk together flour, baking soda, baking powder, and salt.
Gradually add the dry ingredients to the wet ingredients (I recommend doing this in 3 or 4 parts), stirring after each addition until all dry ingredients are thoroughly incorporated.
Stir in chopped chocolate.
Scoop cookies by 3 Tablespoon-sized scoops (62g) and gently roll between your palms to create a smooth ball. Place on prepared baking sheet, spacing cookies at least 2” apart.
Transfer to center rack of 350F (175C) preheated oven and bake for 10 minutes. Within a minute or two of removing from the oven, gently flatten with the clean bottom of a measuring cup (the bottom can get a bit messy from the melted chocolate, you may need to carefully wipe it clean with a paper towel between cookies) to gently compress the cookies and give them a flat surface (don’t skip this!). Allow to cool completely on baking sheet before enjoying!