Preheat oven to 350°F (175°C). Grease and line a 9×9 inch pan with parchment paper.
Make the brownie batter:
Mix melted butter, sugar, eggs, and vanilla until smooth.
Stir in cocoa powder, flour, baking powder, and salt.
Spread evenly into the prepared pan.
Make the cookie dough:
Cream butter, brown sugar, and granulated sugar until fluffy.
Beat in egg and vanilla.
Stir in flour, baking soda, and salt.
Fold in chocolate chips.
Assemble:
Drop spoonfuls of cookie dough over the brownie batter. Gently spread to cover most of the top.
Bake:
Bake for 30–35 minutes, until golden on top but still slightly soft in the center.
Cool completely before cutting into squares.
Shortcut Brookies (with Mixes)
If you want it super easy:
1 box brownie mix (prepare as directed on box)
1 package refrigerated cookie dough (like Toll House or Pillsbury)
Spread brownie batter into pan.
Crumble cookie dough evenly on top.
Bake at 350°F (175°C) for 35–40 minutes.
