1-First Step: Prepare the Cookie Dough Cream the 1 stick salted butter (1/2 cup, very soft), 3/4 cup white sugar, and 2 tablespoons brown sugar, packed, with an electric mixer until it’s nice and smooth this takes about 2-3 minutes. Add the 1 egg and 1/2 teaspoon vanilla, then mix again until fully combined. For vegan adaptations, swap the egg with a flax egg to keep the dough binding properly.

2-Second Step: Mix in the Dry Ingredients Stir in 1 cup plus 2 tablespoons flour, 1/2 teaspoon baking soda, and 1/4 teaspoon salt until just combined, being careful not to overmix this helps avoid tough chocolate chip cookie brownies. Fold in 1 cup chocolate chips gently. If you’re going gluten-free, use a gluten-free flour blend and mix a tad longer for even distribution, but watch for that lower-calorie tweak by reducing sugar here.

3-Third Step: Refrigerate the Dough Pop the dough in the fridge until you’re ready to use it; this step, which takes about 10-15 minutes, makes it easier to handle and prevents spreading too much in the oven. This is a great time to adapt for dietary needs, like using plant-based butter if you’re vegan, to ensure the dough firms up correctly.

4-Fourth Step: Prepare the Brownie Base Preheat your oven to 350°F (175°C) and get that brownie mix 18.9 ounces ready according to the package instructions, which usually involves mixing with water, oil, and eggs. Pour the batter into an 8×8 or 9×9 glass baking dish for even baking. For low-calorie versions, substitute oil with applesauce to cut fats while keeping the moisture in your chocolate chip cookie brownies.

5-Fifth Step: Assemble the Layers Scatter pieces of the refrigerated cookie dough over the brownie batter, pressing them gently so they sink in a bit this creates that awesome layered effect. Adjust for gluten-free by ensuring your flour blend doesn’t make the dough too sticky, and if you’re vegan, double-check your brownie mix for any animal-derived ingredients.

6-Sixth Step: Bake to Perfection Bake for 35-40 minutes, checking after 20 minutes and covering with foil if the top browns too quickly; this keeps everything even. For a fudgy texture, underbake slightly by pulling it out when a toothpick has a few crumbs. Aim for that 350°F mark and adapt baking time if using lower-calorie swaps, as they might cook faster.

7-Final Step: Cool and Serve Let it cool for 15-20 minutes before cutting into about 24 pieces; this helps the chocolate chip cookie brownies set without falling apart. For dietary tweaks, like low-calorie options, serve smaller portions to keep it balanced, and pair with milk for the full experience as the recipe notes suggest.