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

In a large bowl, cream together the butter, brown sugar, and granulated sugar until smooth.

Beat in the eggs one at a time, then stir in the vanilla extract.

In another bowl, whisk together cocoa powder, flour, baking powder, and salt. Gradually add dry ingredients to the wet mixture until just combined.

Fold in chocolate chips and rainbow sprinkles gently.

Drop tablespoon-sized dough onto prepared baking sheets about two inches apart.

Bake for 10-12 minutes until set but still soft in the center.

Allow to cool slightly before enjoying.