Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a mixing bowl, whisk together the melted butter, brown sugar, and granulated sugar until well combined.
Add the eggs and vanilla extract to the mixture and whisk until smooth.
In another bowl, sift together the flour, cocoa powder, baking powder, and salt.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Fold in the chocolate chips.
Drop spoonfuls of dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake for 10-12 minutes, or until the edges are set but the centers are still soft.
Allow the brookies to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.