Preheat the oven

• Preheat the oven to 180 °C.

Prepare the brownie batter

• Combine the brownie mix, egg, oil and water in a bowl.
• Stir until smooth and glossy.

Layer the brownie and cookie dough

• Spread the brownie batter evenly in a lined baking dish.
• Drop spoonfuls of cookie dough over the top and press them in slightly.

Bake the brookies

• Bake until the edges are set and the center is slightly soft.

Cool and cut

• Let the brookies cool completely in the dish.
• Cut into squares and serve.