1Preheat oven to 350º. Heat chopped chocolate and butter in a microwave safe dish for 20 second increments, stirring in between, until almost melted. Do not overheat.
2In another bowel sift together the flour, cocoa, baking powder and salt.
3In a mixing bowl, beat eggs, brown sugar and vanilla on high until light and fluffy. Reduce speed to low and add in melted chocolate. Mix together and then add flour mixture until just combined. Stir in chocolate chunks.
4Drop heaping tablespoons of dough 2 to 3 inches apart onto baking sheet covered with parchment paper. Rotate cookie sheets part way through baking.
Bake until cookies are shiny and crackly yet soft in centers. Do not over bake these cookies. They are meant to be soft and chewy.
About 12 to 15 minutes.
5Cool cookies on cooling rack on parchment paper. Cool completely before storing in air tight container.