If you love the rich decadence of fudgy brownies combined with the delightful chewiness of a monster cookie, then this Cookie Fudgy Brownies Recipe is going to be your new obsession. Imagine biting into a luscious, chocolate-packed brownie base topped with generous dollops of cookie dough bursting with oats, mini M&M’s, and chocolate chips. It’s the perfect marriage of two classic desserts, each elevating the other with gooey texture, swirls of flavor, and that comforting homemade charm. Whether you’re baking for a crowd or just treating yourself, this recipe promises an unforgettable dessert experience that is as impressive as it is delicious.

Ingredients You’ll Need

A large clear glass bowl filled with thick cookie dough mixed with many small dark chocolate chips and colorful candy-coated chocolate pieces in green, yellow, orange, blue, and red, creating a dense and textured mixture. The dough is creamy beige with a slightly rough, chunky texture holding the chocolate and candy pieces closely together, all set against a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

To create this winning combination, the ingredients are straightforward yet carefully chosen to provide the perfect balance of texture and flavor. Each one plays a crucial role, from the smoothness of the butter to the pop of mini M&M’s color, elevating this recipe beyond everyday brownies or cookies.

White granulated sugar (1 1/3 cup): Sweetens the brownies without overpowering the deep chocolate flavors.
Large eggs (2) and Egg yolk (1): Add richness and help give the batter structure and moisture.
Unsalted butter (5 TBSP + 1/4 cup room temp): Provides lusciousness and fudginess for the brownies and softness for the cookie dough.
Oil (1/3 cup canola or vegetable): Keeps the brownies ultra moist and tender.
Pure vanilla extract (2 tsp total): Enhances all the sweet flavors and adds warmth.
All-purpose flour (1/2 cup + 1/2 cup): The essential base for both the brownies and the cookie dough, giving structure and bite.
Unsweetened Dutch-process cocoa powder (3/4 cup): Gives the brownies their rich, dark chocolate intensity.
Cornstarch (1 TBSP + 1 tsp): Helps create a tender crumb for the brownies and a soft chewy texture in the cookie layer.
Salt (1/4 tsp + 1/4 tsp + 1/8 tsp): Balances sweetness and intensifies chocolate flavor.
Semi-sweet chocolate chips (1/2 cup) and Milk chocolate chips (1/2 cup): Melt into pockets of gooey chocolate throughout the brownie layer.
Baking soda (1/2 tsp) and Baking powder (1/8 tsp): Leaven the cookie dough for a light but chewy bite.
Brown sugar (1/3 cup, packed light or dark): Adds moistness and a subtle molasses note to the cookie dough.
White granulated sugar (1/8 cup): Balances sweetness and helps soften the cookie texture.
Peanut butter (1/4 cup, creamy): Brings a delicious nutty richness that complements chocolate beautifully.
Large egg (1, room temperature): Binds the cookie dough ingredients while keeping it tender.
Quick oats (1/2 cup): Give the cookie dough a chewy, hearty texture and a wholesome contrast.
Mini chocolate chips (1/2 cup): Provide tiny bursts of chocolate in the cookie dough topping.
Mini M&M’s (1/2 cup): Add colorful crunch and a playful texture to the cookie layer.

How to Make Cookie Fudgy Brownies Recipe

Step 1: Prepare the Monster Cookie Dough

Start by combining the dry ingredients for the cookie dough: flour, cornstarch, baking soda, baking powder, and salt. These ensure your cookies get the perfect chewy yet tender texture. Next, beat together butter and sugars until fluffy to create a light, creamy base. Adding peanut butter gives the dough irresistible richness and a hint of nuttiness that pairs wonderfully with chocolate. Incorporate vanilla and the egg to bind everything. Finally, mix in oats, mini M&M’s, and chocolate chips before chilling the dough to help it set up and become easier to handle.

Step 2: Get the Brownie Batter Ready

While your cookie dough chills, it’s time for the brownies. Preheat your oven to 325°F, then prepare your pan by spraying and lining it with parchment for an easy release later. Whisk together the dry ingredients for the brownies separately — flour, cocoa powder, cornstarch, and salt — to evenly distribute the chocolate flavor and structure. Beat sugar, eggs, and egg yolk until the mix is pale and airy; this luscious texture forms the foundation for the fudgy brownies. Melt butter while you beat then add it in along with oil and vanilla. Gently fold the dry ingredients and the chocolate chips to keep the batter light and full of little melty chocolate morsels.

Step 3: Bake the Brownies & Add Cookie Dough

Pour the brownie batter into your prepared pan, smoothing it out evenly. Bake for 15 minutes just until the surface sets lightly, which lets the cookie dough layer meld beautifully instead of sinking in too much. Then, break out the chilled cookie dough and shape it into small discs. Press these cookie dough discs evenly on top of the brownie layer before returning it to the oven. Cover loosely with foil to prevent over-browning and bake for another 20-25 minutes. You want a fully set cookie and brownie layer without any jiggle.

Step 4: Cool and Enjoy

Once baked, transfer your masterpiece to a cooling rack and let it cool fully to room temperature. This allows the layers to set perfectly, making it easy to cut out those thick, fudge-filled squares that are as beautiful as they are tasty.

How to Serve Cookie Fudgy Brownies Recipe

The image shows a close-up of a square blondie bar topped with bright, colorful candy-coated chocolates in red, yellow, green, orange, and blue, along with melted dark chocolate chips scattered throughout. The blondie has a soft and slightly crumbly texture, with the candies embedded in and sitting on top of the golden-brown baked surface. The blondie is placed on crumpled light brown parchment paper on a white marbled surface. In the upper part of the image, part of a white bowl filled with more colorful candy-coated chocolates is visible, slightly out of focus. photo taken with an iphone --ar 4:5 --v 7

Garnishes

To give your Cookie Fudgy Brownies Recipe an extra pop, sprinkle a handful of mini chocolate chips or M&M’s on top after baking for added color and texture. A light dusting of cocoa powder or powdered sugar can also enhance the visual appeal, making each serving look as tempting as it tastes.

Side Dishes

This dessert is rich and filling, so pairing it with a scoop of vanilla ice cream or a dollop of lightly whipped cream helps balance the deep chocolate flavors and adds a creamy contrast. Fresh berries or a drizzle of caramel sauce are other fabulous companions that amplify each bite.

Creative Ways to Present

For a fun twist, cut your Cookie Fudgy Brownies into bite-sized pieces and serve them on a dessert platter alongside different dipping sauces, like melted peanut butter or chocolate ganache. Alternatively, use cookie cutters to create festive shapes for holidays or special occasions, turning this delightful treat into a show-stopper.

Make Ahead and Storage

Storing Leftovers

Store any leftover Cookie Fudgy Brownies at room temperature in an airtight container for up to 3 days. This keeps them soft and chewy, preserving that perfect fudgy texture.

Freezing

For longer storage, wrap the brownies tightly in plastic wrap and place in a freezer-safe container or bag. They freeze beautifully for up to 2 months. Thaw overnight in the fridge before serving for best results.

Reheating

If you prefer your brownies warm, gently reheat them in the microwave for 15–20 seconds. This melts the chocolate chips slightly and brings back that fresh-from-the-oven comfort without drying them out.

FAQs

Can I substitute peanut butter in the cookie dough?

Yes, you can swap peanut butter for almond butter or sunflower seed butter if you want a different nutty flavor or need a peanut-free option. Just keep the creamy texture similar for the best results.

How do I know when the Cookie Fudgy Brownies are done baking?

The brownies are ready when the cookie layer looks set and no longer jiggly. A toothpick inserted should come out mostly clean with a few moist crumbs but no wet batter.

Can I use regular cocoa powder instead of Dutch-process?

Dutch-process cocoa is preferred for its darker color and milder acidity, which balances the flavors here. If you only have natural cocoa powder, you can use it but your brownies might have a slightly different taste and color.

Is it necessary to chill the cookie dough before baking?

Chilling the cookie dough helps it firm up, making it easier to handle and ensuring it bakes without melting into the brownie layer. It also improves the texture of the cookie part of this recipe.

Can this recipe be made gluten-free?

To make it gluten-free, substitute the all-purpose flour with a 1:1 gluten-free baking flour blend. Just be sure your cocoa and other mix-ins are certified gluten-free for safety.

Final Thoughts

This Cookie Fudgy Brownies Recipe is pure magic for anyone who adores combining the best parts of cookies and brownies into one unforgettable treat. With rich chocolate, chewy oat-filled cookie pieces, and bright pops of color from mini M&M’s, it’s a dessert that invites smiles and second helpings. I promise once you bake this, it will quickly become your go-to for celebrations, cozy nights, or anytime you want a sweet hug in dessert form.

Cookie Fudgy Brownies Recipe