Step 1

Preheat the oven to 350F degrees. Line a baking sheet with parchment paper or a silicone baking mat and set aside.

Step 2

In a medium sized bowl mix together the butter, sugars, egg yolk and vanilla.

Step 3

Add in the flour, cocoa & baking powder and stir until combined.  Then stir in 2 tablespoons of the chocolate chips.

Step 4

Form the dough into a large ball, place on the prepared baking tray and stud the top of the cookie with the remaining chocolate chips.

Step 5

Bake for 12-14 minutes until the top of the cookie looks almost set. Allow to cool for at least 5 minutes before devouring.