Monster Cookie Fudgy Brownies
If you’re looking for a dessert that’s both indulgent and fun, you’ve landed in the right place with these Monster Cookie Fudgy Brownies! This delightful treat combines two beloved favorites: rich, fudgy brownies and chewy monster cookies. The result? A decadent dessert that is sure to impress your family and friends. Whether it’s a busy weeknight or a festive gathering, these brownies will bring a smile to everyone’s face.
What makes this recipe so special is its perfect balance of textures. The soft brownie base pairs beautifully with the yummy, crunchy toppings. Plus, they are easy enough to whip up on a whim! Trust me, once you try them, you’ll want to make these Monster Cookie Fudgy Brownies again and again.
Why You’ll Love This Recipe
- Easy to Make: With just a few simple steps, you can create an impressive dessert that looks as good as it tastes.
- Family-Friendly: Kids (and adults!) will love the combination of flavors and textures in every bite.
- Make-Ahead Convenience: These brownies can be prepared ahead of time, making them perfect for parties or meal prep.
- Versatile Treat: Serve them warm with ice cream or enjoy them as they are—either way, they’re delicious!

Ingredients You’ll Need
Get ready to gather some simple and wholesome ingredients for these delightful brownies! Most of these items are likely already in your pantry, making this recipe even more convenient.
For the Brownie Base
- 1 1/3 cup White granulated sugar
- 2 Large eggs
- 1 Egg yolk
- 5 TBSP Unsalted butter
- 1/3 cup Oil (canola or vegetable)
- 1 tsp Pure vanilla extract
- 1/2 cup All-purpose flour
- 3/4 cup Unsweetened cocoa powder (Dutch process)
- 1 TBSP Cornstarch
- 1/4 tsp Salt
- 1/2 cup Semi-sweet chocolate chips
- 1/2 cup Milk chocolate chips
For the Monster Cookie Topping
- 1/2 cup All-purpose flour
- 1 tsp Cornstarch
- 1/2 tsp Baking soda
- 1/8 tsp Baking powder
- 1/4 tsp Salt
- 1/4 cup (room temperature) Unsalted butter
- 1/3 cup (packed light or dark) Brown sugar
- 1/8 cup White granulated sugar
- 1/4 cup (creamy) Peanut butter
- 1 tsp Pure vanilla extract
- 1 Large (room temperature) egg
- 1/2 cup Quick oats
- 1/2 cup Mini chocolate chips
- 1/2 cup Mini M&M’s
Variations
One of the best parts about these Monster Cookie Fudgy Brownies is how flexible they are! Feel free to get creative and customize them according to your taste.
- Nutty Add-In: Toss in some chopped nuts like walnuts or pecans for an extra crunch.
- Different Chocolates: Swap out semi-sweet chocolate chips for dark chocolate for a richer flavor.
- Candy Swap: Replace mini M&M’s with your favorite candies for a colorful twist!
How to Make Monster Cookie Fudgy Brownies
Step 1: Preheat Your Oven and Prepare the Pan
Start by preheating your oven to 350°F (175°C). Grease a 9×13-inch baking dish or line it with parchment paper. This step ensures that your brownies come out easily after baking without sticking.
Step 2: Make the Brownie Batter
In a large mixing bowl, combine the white granulated sugar, eggs, egg yolk, melted unsalted butter, oil, and vanilla extract. Mix until well combined. Then sift in the all-purpose flour, cocoa powder, cornstarch, and salt. Stir gently until everything comes together into a smooth batter; this will give you those deliciously fudgy brownies!
Step 3: Fold in Chocolate Chips
Gently fold in both semi-sweet and milk chocolate chips into your brownie batter. This adds little pockets of melty goodness throughout your brownies that everyone will love.
Step 4: Prepare the Monster Cookie Layer
In another bowl, mix together the flour, cornstarch, baking soda, baking powder, salt, brown sugar, white granulated sugar, peanut butter, vanilla extract, egg, quick oats, mini chocolate chips, and mini M&Ms until well combined. This mixture adds sweetness and texture atop your fudgy brownies!
Step 5: Layer It All Together
Spread half of the brownie batter evenly into your prepared pan. Next, layer on all of the monster cookie dough carefully over the brownie layer. Finally, dollop spoonfuls of the remaining brownie batter on top of the cookie layer. Use a knife or spatula to swirl them together slightly; this gives you that beautiful marbled effect!
Step 6: Bake Until Perfect
Place your pan in the preheated oven and bake for about 40 minutes or until a toothpick inserted into the center comes out mostly clean. Let them cool slightly before cutting into squares. Enjoy every gooey bite!
Pro Tips for Making Monster Cookie Fudgy Brownies
Baking these delightful Monster Cookie Fudgy Brownies is a fantastic way to impress your friends and family, and with these tips, you’ll ensure they turn out perfectly every time!
- Use room temperature ingredients: Bringing your eggs and butter to room temperature helps create a smoother batter, leading to a fudgier texture that’s hard to resist.
- Don’t overmix the brownie batter: Gently mixing until just combined prevents the brownies from becoming tough. A little bit of lumpiness is perfectly fine!
- Check for doneness carefully: Oven temperatures can vary, so start checking your brownies a few minutes before the suggested cooking time. You want them set on the edges but still slightly soft in the center for that perfect fudgy bite.
- Let them cool completely: Once baked, allow your brownies to cool in the pan before cutting. This helps them firm up and makes slicing much easier without crumbling.
- Store properly: To keep your brownies fresh, store them in an airtight container at room temperature for up to 3 days or refrigerate for longer-lasting goodness. Just remember to bring them back to room temperature before serving for that gooey experience!
How to Serve Monster Cookie Fudgy Brownies
These Monster Cookie Fudgy Brownies are not only delicious but also visually appealing! Presenting them well can make your dessert even more special.
Garnishes
- Whipped cream: A dollop of whipped cream on top adds a lightness that contrasts beautifully with the rich brownies.
- Chocolate drizzle: A simple drizzle of melted chocolate gives an elegant touch and enhances the chocolate flavor.
- Sprinkles: Colorful sprinkles can add a fun pop of color, making these brownies perfect for parties or celebrations.
Side Dishes
- Vanilla ice cream: The creamy texture of vanilla ice cream complements the fudgy brownies perfectly, creating a classic dessert duo.
- Fresh berries: A side of strawberries or raspberries adds a refreshing contrast and cuts through the sweetness—plus they look gorgeous on the plate!
- Coffee or espresso: Serving these brownies with a cup of coffee or espresso elevates the dessert experience; the bitterness balances the sweetness beautifully.
- Milkshake: For a fun twist, pair these brownies with a milkshake. Whether it’s chocolate or vanilla, it’s sure to be a hit!
Now that you have all these tips and serving suggestions at hand, you’re ready to whip up some Monster Cookie Fudgy Brownies that everyone will adore! Enjoy every delicious bite!

Make Ahead and Storage
These Monster Cookie Fudgy Brownies are perfect for meal prep, allowing you to enjoy a delicious dessert throughout the week without the fuss of daily baking.
Storing Leftovers
- Allow the brownies to cool completely before storing.
- Cut them into bars and place in an airtight container.
- Store at room temperature for up to 3 days or in the refrigerator for up to a week.
Freezing
- Wrap individual brownie bars tightly in plastic wrap.
- Place them in a freezer-safe bag or container to prevent freezer burn.
- Freeze for up to 3 months. When ready to enjoy, simply thaw at room temperature.
Reheating
- For a warm treat, microwave individual brownies for about 10-15 seconds.
- Alternatively, reheat in an oven at 350°F (175°C) for about 5-10 minutes until warmed through.
FAQs
Here are some common questions you might have about making Monster Cookie Fudgy Brownies.
Can I make Monster Cookie Fudgy Brownies gluten-free?
Yes! You can substitute all-purpose flour with a gluten-free flour blend that measures cup-for-cup.
What makes these Monster Cookie Fudgy Brownies so special?
These brownies combine rich fudgy chocolate with chewy monster cookie goodness, creating a delightful dessert that everyone will love!
Can I replace peanut butter in the recipe?
Absolutely! If you’re looking for nut-free options, use sunflower seed butter or tahini as a great alternative.
Final Thoughts
I hope you find joy in baking these Monster Cookie Fudgy Brownies! They’re not only delicious but also offer a fantastic way to share sweetness with friends and family. Enjoy every gooey bite, and don’t hesitate to experiment with your favorite mix-ins. Happy baking!
Monster Cookie Fudgy Brownies
Indulge in the ultimate dessert experience with these Monster Cookie Fudgy Brownies! This delightful treat brings together two beloved favorites: intensely rich, fudgy brownies and chewy monster cookies. Perfect for family gatherings, weekend treats, or a cozy night in, this recipe is designed to impress everyone at the table. Enjoy the delicious contrast of textures as you bite into the soft brownie base topped with crunchy cookie goodness. Easy to prepare and full of flavor, you’ll find yourself making these brownies again and again!
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Total Time: 55 minutes
- Yield: Approximately 24 servings 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
Ingredients
- 1 1/3 cup white granulated sugar
- 2 large eggs
- 1 egg yolk
- 5 TBSP unsalted butter
- 1/3 cup oil (canola or vegetable)
- 1 tsp pure vanilla extract
- 1/2 cup all-purpose flour
- 3/4 cup unsweetened cocoa powder
- 1 TBSP cornstarch
- 1/4 tsp salt
- 1/2 cup semi-sweet chocolate chips
- 1/2 cup milk chocolate chips
- 1/2 cup all-purpose flour
- 1 tsp cornstarch
- 1/2 tsp baking soda
- 1/8 tsp baking powder
- 1/4 tsp salt
- 1/4 cup unsalted butter
- 1/3 cup packed brown sugar
- 1/8 cup white granulated sugar
- 1/4 cup creamy peanut butter
- 1 tsp pure vanilla extract
- 1 large egg
- 1/2 cup quick oats
- 1/2 cup mini chocolate chips
- 1/2 cup mini candies
Instructions
- Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking dish.
- In a mixing bowl, combine sugar, eggs, melted butter, oil, and vanilla until smooth. Sift in flour, cocoa powder, cornstarch, and salt; mix until combined.
- Fold in semi-sweet and milk chocolate chips.
- In another bowl, combine flour, cornstarch, baking soda, baking powder, salt, brown sugar, white sugar, peanut butter, vanilla extract, egg, quick oats, mini chocolate chips, and candies until well mixed.
- Spread half of the brownie batter in the pan. Layer on the cookie dough mixture and dollop remaining brownie batter on top. Swirl gently with a knife.
- Bake for about 40 minutes or until a toothpick comes out mostly clean. Let cool before slicing.
Nutrition
- Serving Size: 1 brownie (75g)
- Calories: 225
- Sugar: 19g
- Sodium: 150mg
- Fat: 10g
- Saturated Fat: 4g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 30g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 35mg
