Preheat the oven to the temperature listed on the brownie box mix.
In a large mixing bowl add the brownie mix along with the ingredients listed on the box. Mix together until combined and smooth.
Transfer to an 8x8 baking dish lined with parchment paper. Spread batter evenly.
Bake in the oven for 8-10 minutes less than the time stated on the box mix directions. This will ensure fudgy, slightly undone brownies.
While the brownies are baking, make the chocolate chip cookie dough.
In a separate bowl, add the melted butter, brown sugar and granulated sugar. Whisk together until combined.
Add the eggs and vanilla extract. Whisk again until smooth.
Now add the flour, baking soda and salt. Fold the dry ingredients into the wet until combined.
Pour in the chocolate chips and fold into the batter until evenly distributed.
Cover the cookie dough with plastic wrap and place in the fridge for 30 minutes to chill.
Once the brownies are done baking, let them cool completely.
When you're ready to bake the cookies, preheat the oven to 350 degrees.
Remove the brownies from the pan and cut into small ½ inch by ½ inch squares, creating about 25 from the square brownie sheet.
Remove the chilled cookie dough from the refrigerator. Scoop a large ball out and flatten in your hand. Press a small square piece of the brownies into the center of the chocolate chip cookie dough.
Fold the edges of the cookie dough up around the brownie piece. Then finish the top with a smaller piece of cookie dough to cover and seal the rest of the brownie inside the dough ball.
Repeat with the rest of the dough and place each finished dough ball on a baking sheet lined with parchment paper.
Place them at least 2 inches apart from each other, only fitting 8 cookies on a pan at a time.
Bake in the oven for 12-15 minutes or until the edges of the cookies are golden brown and the center is slightly undercooked.
Remove from the oven and allow the cookies to cool on the baking sheet for about 5 minutes. Serve warm, or transfer to a wire rack to cool completely before storing in an airtight container.
Keyword brownies, chocolate chip cookies, stuffed cookies