Preheat the oven to 300 degrees.

Melt the chocolate chips in the microwave at 20 second intervals stirring thoroughly each time until melted. Set aside.

In the bowl of an electric mixer, beat together the butter, sugar and brown sugar on medium speed until fluffy. Turn the mixer to low and add the eggs one at a time mixing thoroughly between each addition. Slowly add the melted chocolate and stir to combine.

In a medium bowl, whisk together the flour, cocoa powder, baking powder and salt. Slowly add the flour mixture to the egg mixture with the mixer on low speed. Mix to combine thoroughly stopping once to scrape down the sides of the bowl with a spatula. Slowly add the chocolate chunks and stir thoroughly.

On a baking sheet lined with parchment paper, drop approximately 2 tablespoons of dough in dollops about 3 inches apart. Gently press down on the dough with your fingers or the back of a spoon to spread the dough into 2-inch circles. Transfer to the oven and back for approximately 18-20 minutes or until the cookies are lightly browned around the edges. Bake a little longer for crispier cookies.

Store in an airtight container.