Step 1

Preheat oven to 375°F. Line a baking sheet with parchment paper and set aside.

Step 2

In the bowl of a stand mixer fitted with the paddle attachment mix the butter and both sugars together on medium speed for 2 minutes, scraping the sides of the bowl as necessary. Add in the eggs, vanilla, baking powder, baking soda, and salt and mix until combined and smooth.

Step 3

Turn the mixer to low and slowly add in the flour, mixing until just combined. Add in the chocolate chips and chopped chocolate and mix until evenly incorporated.

Step 4

Using a food scale, measure out the dough into 8-ounce portions. Form the dough into a ball and place 4-inches apart on lined baking sheet. I fit 4 cookies on each baking sheet.

Step 5

Bake for 13-14 minutes until the bottoms are lightly browned and edges are golden. The tops of the cookies will feel set, but the insides will be slightly under-baked, this is fine.

Step 6

Allow the cookies to cool on the baking sheet for 4 minutes before transferring them to a wore rack to cool completely.