Beat the butter and both sugars until fluffy and light in color — about 4 minutes.
Beat in the egg until well-combined, at least another 1-2 minutes. Then beat in the extracts.
Add in the flour, cocoa powder, salt, baking soda, and baking powder and mix until just combined.
Stir in a cup of the chocolate chunks.
Create 1-tablespoon balls of cookie dough and then stick more chocolate chunks onto the balls of dough.
Chill the balls for an hour.
While the dough chills, preheat the oven to 350°F.
Bake for 10- 12 minutes, or until the edges are set and the tops are puffy and not shiny/overly raw looking.
Remove from the oven and allow to cool on the baking sheet for at least 3 minutes before transferring to a wire rack to cool completely.