Creating these Chocolate Chip Cookie + Brownie Bars is simple when you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish or line it with parchment paper.
2. Prepare Brownie Batter: If using a brownie mix, prepare the brownie batter according to package instructions. Set aside.
3. Mix Cookie Batter:

• In a large mixing bowl, beat the softened butter, granulated sugar, and brown sugar until creamy.
• Add the eggs one at a time, followed by the vanilla extract. Mix until well combined.

1. Combine Dry Ingredients: In another bowl, whisk together the flour, cocoa powder, baking powder, baking soda, and salt.
2. Combine Mixtures: Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Avoid overmixing.
3. Fold in Chocolate Chips: Gently fold in the chocolate chips to the cookie batter.
4. Layering:

• Pour half of the cookie batter into the prepared baking dish and spread it evenly.
• Pour the brownie batter on top, spreading it carefully to avoid disturbing the cookie layer.
• Finally, dollop the remaining cookie batter on top of the brownie layer, spreading slightly but keeping it chunky for texture.

1. Bake: Place the baking dish in the preheated oven and bake for 25-30 minutes, or until a toothpick inserted into the center comes out with moist crumbs.
2. Cool: Remove from the oven and let the bars cool in the baking dish for at least 15-20 minutes before slicing.
3. Slice: Cut into squares or rectangles to serve, ensuring you get equal portions for everyone!