Irresistible Chocolate Chip Oreo Brownie Bars: The Ultimate Layered Dessert Recipe

Prepare to tantalize your taste buds with a dessert that brings together three beloved treats into one spectacular bar: the **Chocolate Chip Oreo Brownie Bar**. This isn’t just any ordinary baked good; it’s a delightful architectural marvel of deliciousness, featuring a rich, chewy chocolate chip cookie base, a crunchy layer of whole Oreo cookies, and a decadent, fudgy brownie topping. It’s the perfect harmony of textures and flavors in every single bite.

What Makes These Layered Brownie Bars So Special?

The magic of these bars lies in their glorious layers. Imagine biting into:

A Chewy Chocolate Chip Cookie Base: The foundation is a classic, buttery chocolate chip cookie dough, providing that comforting, familiar taste and a delightful chewiness.
A Crunchy Oreo Middle: Nestled perfectly on top of the cookie dough are whole Oreo cookies, adding a crisp texture and that iconic chocolate and cream flavor that everyone loves. For this particular recipe, I initially used the 100th Anniversary cake batter flavored Oreos, which created charming little confetti dots in the bars. However, if those aren’t available, Double Stuff Oreos are an excellent — and highly recommended — choice for an extra creamy kick.
A Fudgy Brownie Top: Capping it all off is a rich, dense, and intensely chocolatey brownie layer, baked to fudgy perfection. It brings a deep cocoa flavor and a wonderfully soft texture that complements the other layers beautifully.

Together, these layers create a dessert experience that is truly unforgettable – a symphony of sweet, chocolatey, and utterly satisfying indulgence.

A Decade of Deliciousness: The Evolution of a Favorite Recipe

This particular recipe for Chocolate Chip Oreo Brownie Bars has been a beloved staple for over a decade. Since its initial posting in 2012, I’ve experimented with numerous variations, refining and perfecting the balance of flavors and textures. This version, designed specifically for an 8-inch square pan, makes it easy to create a batch that’s just right for a smaller gathering or when you simply crave a manageable amount of this amazing treat. For larger crowds or bigger cravings, remember you can easily double the recipe to fit a 9×13 inch pan.

One of the best features of this recipe, which makes it incredibly appealing to home bakers, is its innovative “one-bowl” method. You start by preparing the chocolate chip cookie dough in a single mixing bowl. Once that’s pressed into the pan, you can then proceed to mix the brownie batter directly in the same bowl, minimizing cleanup and streamlining the entire baking process. It’s a testament to simple, efficient baking without compromising on flavor or quality.

Essential Ingredients and Smart Substitutions

While the recipe itself is straightforward, a few notes on ingredients can elevate your baking experience:

Butter & Sugars: Using softened unsalted butter ensures a smooth, creamy cookie dough base. The combination of granulated sugar and packed light brown sugar contributes to both sweetness and a wonderfully chewy texture.
Oreo Choice: As mentioned, Double Stuff Oreos are highly recommended if you can’t find specific limited-edition flavors. Their extra cream filling adds an additional layer of richness that pairs perfectly with the chocolate chip cookie and brownie. Feel free to experiment with other Oreo flavors like Mint, Peanut Butter, or even Golden Oreos for a unique twist.
Cocoa Powder: For the brownie layer, unsweetened natural cocoa powder delivers a classic, rich chocolate flavor. If you prefer a darker, more intense brownie, Dutch-processed cocoa powder can be used, though it might slightly alter the texture due to its different acidity level.
Measuring by Weight: To help ensure precision and consistent results, especially for our international bakers or those who simply prefer it, I’ve added gram measurements to the recipe. This can make a significant difference in baking, providing a more accurate way to measure dry ingredients compared to volume cups.

This recipe is not only a fantastic dessert but also a fun project. It’s incredibly forgiving and allows for minor adjustments based on what you have in your pantry or your personal preferences. The joy of baking these bars is almost as satisfying as eating them!

Below, you’ll find the full, detailed recipe, now updated with gram measurements and a more realistic serving size of 9 squares for this 8-inch pan version. Get ready to bake a batch of these extraordinary layered treats!

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Recipe: Chocolate Chip Oreo Brownie Bars

Chocolate Chip Oreo Brownie Bars

Anna

Bar cookies made with chocolate chip cookie dough, Oreos, and brownie batter. This recipe makes an 8 inch square pan, so double it if you want to make a 9×13 inch pan.

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Prep Time
10 minutes

Cook Time
40 minutes

Total Time
50 minutes

Course
Dessert

Cuisine
American

Servings
9 squares

Ingredients

Cookie Base

1 stick unsalted butter, softened (114 grams)
6 tablespoons granulated sugar (75 grams)
6 tablespoons packed light brown sugar (75 grams)
¾ teaspoon vanilla extract
1 large egg
1 cup plus 2 tablespoons all-purpose flour (140 grams)
½ teaspoon baking soda
½ teaspoon salt
⅔ cup chocolate chips
9 whole Double Stuff Oreos

Brownie Layer

6 tablespoons unsweetened natural cocoa powder
½ cup vegetable oil
2 large eggs
1 cup granulated sugar
1 teaspoon vanilla extract
⅛ teaspoon salt
¾ cup all-purpose flour (100 grams)

Instructions

Preheat oven to 350 degrees F (175°C). Line an 8-inch square metal baking pan with foil, allowing it to overhang slightly on the sides to create “handles” for easy removal. Spray the foil with cooking spray to prevent sticking.
In a large mixing bowl, cream together the softened unsalted butter with the granulated sugar and packed light brown sugar until light and fluffy. Beat in the vanilla extract and the large egg, mixing just until the egg is fully incorporated. Next, beat in the baking soda and salt. By hand, gently stir in the all-purpose flour until it is just combined and no dry streaks remain. Finally, fold in the chocolate chips. Press this cookie dough mixture evenly into the bottom of your prepared 8-inch pan, making sure it covers the entire base.
Carefully press 9 whole Double Stuff Oreos (or your chosen Oreo variety) directly into the cookie dough, arranging them in a 3×3 grid pattern. Ensure they are firmly seated into the dough.
Without cleaning the original mixing bowl, add the unsweetened natural cocoa powder and vegetable oil. Whisk these together until smooth and well combined. Then, whisk in the remaining 2 large eggs, granulated sugar, vanilla extract, and salt until the mixture is smooth and glossy. Stir in the remaining all-purpose flour until just incorporated. Carefully spread this brownie batter evenly over the layer of Oreos in the pan, ensuring all cookies are covered.
Bake on the center rack of your preheated oven at 350°F (175°C) for 38 to 40 minutes. The brownies should appear set around the edges and slightly puffed up, with a slight wobble in the very center when gently shaken. Unfortunately, the toothpick test doesn’t provide a reliable indicator of doneness for these fudgy brownies as it will often come out with moist crumbs. Once baked, remove the pan from the oven and cool completely on a wire rack. For the cleanest cuts, it’s crucial to chill the brownies for about 2 to 3 hours (or even overnight) in the refrigerator. Once thoroughly chilled, use the foil overhang to lift the bars from the pan and cut them into 9 generous squares (or 16 smaller ones, if preferred).

Keyword
Oreo Brownie Bars

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Baking to Perfection: Tips for a Flawless Finish

Achieving the perfect layered bar requires attention to a few key details. Firstly, lining your pan with foil and spraying it is essential for easy removal, especially after chilling. Don’t skip the chilling step; it makes cutting these multi-layered bars much cleaner and prevents them from crumbling.

When pressing the cookie dough into the pan, aim for an even layer. This ensures uniform baking and a consistent base for your Oreos. For the brownie layer, remember that fudgy brownies don’t always pass the traditional “toothpick test” clean. Instead, look for edges that are set and slightly puffed, with the center showing only a slight jiggle. Overbaking can lead to dry brownies, so it’s better to err on the side of slightly underbaked for that desired fudgy texture.

Serving Suggestions and Storage

These Chocolate Chip Oreo Brownie Bars are incredibly versatile. They are perfect on their own, perhaps with a tall glass of milk, or elevated with a scoop of vanilla ice cream and a drizzle of chocolate sauce. They make an excellent addition to potlucks, parties, or simply as a special treat for your family.

To store, place the cut bars in an airtight container at room temperature for up to 3-4 days, or in the refrigerator for up to a week. For longer storage, they can be frozen for up to 2-3 months. Just be sure to separate layers with parchment paper to prevent sticking when freezing.

Creative Variations to Explore

The beauty of this recipe is its adaptability. Here are a few ideas to spark your creativity:

Different Cookie Bases: Swap the chocolate chip cookie dough for peanut butter cookie dough or even a simple sugar cookie base.
Oreo Adventures: Beyond Double Stuff, consider Mint Oreos for a refreshing twist, Golden Oreos for a vanilla-forward flavor, or even a seasonal Oreo flavor.
Brownie Boosters: Mix in chopped nuts (walnuts, pecans), caramel bits, or other candy pieces into the brownie batter for added texture and flavor. A sprinkle of sea salt on top before baking can also enhance the chocolate flavor.
Toppings Galore: Once cooled, consider adding a ganache layer, a swirl of cream cheese frosting, or a dusting of powdered sugar.

Conclusion: A Triple Threat Dessert You Can’t Resist

The Chocolate Chip Oreo Brownie Bars truly are a triple threat dessert, combining the best of cookies, Oreos, and brownies into one easy-to-make, utterly delicious creation. Whether you’re a seasoned baker or just starting out, this recipe promises a rewarding experience and a treat that will disappear quickly from any dessert table. Don’t hesitate to give this ultimate layered dessert a try – your taste buds will thank you!