Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.

In a bowl, whisk together flour, cocoa powder, baking soda, and salt; set aside.

In another bowl, cream softened butter with granulated and brown sugars until light and fluffy.

Beat in eggs one at a time, then add vanilla extract and mix until fully incorporated.

Gradually mix dry ingredients into the wet mixture until just combined.

Gently fold in chocolate chips and candy pieces.

Scoop tablespoon-sized portions of dough onto prepared baking sheets, leaving space between them.

Bake for 10-12 minutes until edges are set but centers remain soft. Allow to cool on the baking sheet for five minutes before transferring to wire racks.