Ingredients
Scale
Brownie Layer
- 3/4 cup butter, softened
- 1 cup sugar
- 1/3 cup brown sugar
- 2 large eggs
- 1 tsp vanilla extract
- 1/2 cup unsweetened cocoa powder
- 1 cup all-purpose flour
- 1/2 tsp baking soda
- 1/4 tsp salt
- 1/2 cup chocolate chips (optional)
Chocolate Chip Cookie Layer
- 1/2 cup butter, softened
- 3/4 cup brown sugar
- 1/4 cup sugar
- 1 large egg
- 1 tsp vanilla extract
- 1 1/4 cups all-purpose flour
- 1/2 tsp baking soda
- 1/2 tsp salt
- 1 cup chocolate chips
- Milk chocolate chunks (optional, for topping)
Instructions
- Preheat oven to 350°F (175°C). Prepare a 9×13-inch aluminum pan.
- For brownie layer: cream 3/4 cup butter with 1 cup sugar and 1/3 cup brown sugar. Add eggs one at a time, then vanilla.
- Whisk cocoa, flour, baking soda, and salt. Gradually fold into butter mixture. Add chocolate chips if using. Spread evenly in pan.
- For cookie layer: cream 1/2 cup butter with 3/4 cup brown sugar and 1/4 cup sugar. Mix in egg and vanilla.
- Stir in flour, baking soda, salt. Fold in chocolate chips.
- Drop cookie dough over brownie batter evenly.
- Bake 28-32 minutes. Add milk chocolate chunks in last 5 minutes if desired.
- Cool completely. Freeze 20-30 minutes before slicing for clean bars.
Notes
- Do not use a glass pan; it can cause hard edges and underbaked centers.
- Aluminum pan gives best texture.
- Cool completely before slicing.
- Freezing before cutting helps make neat bars.
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American