01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, cocoa powder, baking soda, and salt. Set aside.
03 - In a large bowl, cream butter, brown sugar, and granulated sugar until light and fluffy, about 2 minutes.
04 - Beat in eggs one at a time, then add vanilla extract.
05 - Gradually mix in the dry ingredients until just combined.
06 - Gently fold in dark chocolate chunks and raspberries, taking care not to crush the berries.
07 - Drop tablespoon-sized mounds of dough onto prepared baking sheets, spacing 2 inches apart.
08 - Bake for 11–13 minutes, or until edges are set but centers are still soft.
09 - Cool on baking sheets for 5 minutes, then transfer to wire racks to cool completely.