1-First Step: Cream the cookie dough base Cream 1 stick salted butter (1/2 cup, very soft) and sugars (3/4 cup white sugar, 2 tablespoons brown sugar, packed) with an electric mixer until smooth. This takes about 2 minutes. Then add 1/2 teaspoon vanilla and 1 egg; cream again until fluffy. Room-temp ingredients blend best, avoiding lumps.

2-Second Step: Mix in dry ingredients Stir in 1 cup plus 2 tablespoons flour, 1/2 teaspoon baking soda, and 1/4 teaspoon salt gently until just mixed. Overmixing toughens the dough, so stop when you see no flour streaks. For dietary tweaks, this is where gluten-free flour shines.

3-Third Step: Fold in chocolate chips and chill Fold in 1 cup chocolate chips by hand for even distribution. Pop the cookie dough in the fridge until ready to use, about 10-15 minutes. Chilling prevents spreading too much on the warm brownie.

4-Fourth Step: Preheat and prep brownie batter Preheat oven to 350 degrees Fahrenheit. Prepare 18.9 ounce brownie mix according to package instructions. Pour into an 8×8 or 9×9 glass baking dish, greased or lined with parchment. Square pan gives thicker results love that fudgy layer.

5-Fifth Step: Top with cookie dough Scatter pieces of chilled cookie dough over the brownie batter. Press gently so dough sinks slightly into the batter. Use about 1-1.5 cups total dough for coverage without overcrowding. This step locks in the brookie magic.

6-Sixth Step: Bake smartly Bake for 35-40 minutes. Go 35 for gooey texture or 40+ for fully baked. Cookies brown quick, so cover with foil if needed, alternating uncovered and covered to prevent over-browning. Try 20 minutes uncovered, 10 covered, 5 uncovered best results from my tests.

7-Final Step: Cool and serve Let brownies stand for 15-20 minutes before slicing. Cool fully on a rack to avoid sinking. Serve with milk for that melt-in-mouth vibe. Pairs great with coffee or as a warm treat for family nights.