Set oven to 325 degrees Fahrenheit.
In large/medium size bowl, add brownie mix, 1 egg, and 1 tablespoon of water.
Melt 3 spoonfuls of butter in microwave for 30 seconds or until fully melted.
Add 1/2 cup of butter to mixture.
Stir until completely mixed.
In a separate large/medium bowl, add the cookie mix and 2 tablespoons of water.
Complete the butter melting process again, and pour in bowl.
Mix until well blended.
Grease your 9 by 9 pan with cooking spray.
Pour brownie mix before cookie mix.
Spread the mix so it covers the pan.
Add spoonfuls of the cookie batter onto brownie mix.
Place the pan in oven.
Set timer for 42 minutes.
Once finished, bring out of oven. Take a toothpick and stick it in the cookie brownies. Make sure when it comes out there is not any batter. If there is, place in oven for 5 more minutes.
Cut into as many pieces as you desire. Enjoy!