These Monster Cookie Fudgy Brownies combine the rich, fudgy texture of brownies with the chewy goodness of monster cookies. Ideal for any gathering, these brownies are a delightful treat that pleases both kids and adults alike. The unique layers create a dessert experience that is both indulgent and fun, making them perfect for parties, potlucks, or just a cozy night in.
Why You’ll Love This Recipe
- Irresistible Flavor: The combination of chocolatey brownies and chewy cookie dough creates a symphony of flavors that will satisfy any sweet tooth.
- Easy to Make: With straightforward steps and common ingredients, this recipe is simple enough for bakers of all levels.
- Versatile Treat: Perfect for birthdays, holidays, or just because—these brownies fit any occasion!
- Texture Contrast: Enjoy the rich fudgy base topped with chewy cookies for a delightful textural experience in every bite.
- Customizable Toppings: Feel free to swap out chocolate chips or M&Ms for your favorite mix-ins!
Tools and Preparation
Before you start baking these delicious Monster Cookie Fudgy Brownies, gather your tools. Having everything ready will make the process smoother.
Essential Tools and Equipment
- Mixing bowls
- Electric mixer
- Measuring cups and spoons
- Baking pan (9×13 inches)
- Rubber spatula
- Parchment paper
Importance of Each Tool
- Mixing bowls: Essential for combining ingredients without spilling.
- Electric mixer: Saves time and ensures a smooth batter by mixing evenly.
- Baking pan: The right size ensures even cooking and perfect brownie texture.

Ingredients
For the Brownies
- 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 Layer
- 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 (room temperature)
- 1/3 cup Brown sugar (packed light or dark)
- 1/8 cup White granulated sugar
- 1/4 cup Peanut butter (creamy)
- 1 tsp Pure vanilla extract
- 1 Large egg (room temperature)
- 1/2 cup Quick oats
- 1/2 cup Mini chocolate chips
- 1/2 cup Mini M&Ms
How to Make Monster Cookie Fudgy Brownies
Step 1: Preheat the Oven
Preheat your oven to 350°F (175°C). Grease your baking pan or line it with parchment paper for easy removal later.
Step 2: Prepare the Brownie Batter
In a large mixing bowl, combine:
1. Sugar, eggs, egg yolk, butter, oil, and vanilla extract.
2. Mix until smooth using an electric mixer.
3. Gradually add flour, cocoa powder, cornstarch, and salt. Mix until well combined.
4. Fold in semi-sweet and milk chocolate chips.
Step 3: Pour the Brownie Base
Pour the brownie batter into the prepared baking pan. Spread it evenly across the bottom using a rubber spatula.
Step 4: Make the Monster Cookie Layer
In another bowl:
1. Combine flour, cornstarch, baking soda, baking powder, and salt.
2. In a separate bowl, cream together room temperature butter with brown sugar and white sugar until fluffy.
3. Mix in peanut butter and vanilla extract.
4. Add in the egg while mixing well.
5. Gradually incorporate dry ingredients along with oats, mini chocolate chips, and M&Ms.
Step 5: Assemble and Bake
Spoon the monster cookie mixture over the brownie layer. Spread gently to cover evenly but do not worry about perfection; some brownie showing is fine.
Bake in preheated oven for 35-40 minutes or until a toothpick inserted comes out mostly clean (a few moist crumbs are ideal).
Let cool completely before cutting into bars. Enjoy your delicious Monster Cookie Fudgy Brownies!
How to Serve Monster Cookie Fudgy Brownies
These monster cookie fudgy brownies are a delightful treat that can be served in various ways to enhance their flavor and presentation. Here are some creative serving suggestions to enjoy this rich dessert.
A la Mode
- Serve warm brownies with a scoop of vanilla ice cream on top for a classic combination. The creaminess of the ice cream complements the fudgy texture beautifully.
Drizzled with Chocolate Sauce
- Add an extra layer of indulgence by drizzling melted chocolate sauce over the brownies before serving. This will elevate the chocolatey goodness and make it even more appealing.
With Fresh Berries
- Pair your brownies with fresh strawberries or raspberries. The tartness of the berries contrasts nicely with the sweetness of the brownies, adding a refreshing touch.
Topped with Whipped Cream
- Lighten up your dessert by topping the brownies with freshly whipped cream. This adds a fluffy texture that balances the dense fudginess.
As Part of a Dessert Platter
- Cut brownies into smaller squares and arrange them on a platter with other desserts like cookies or fruit tarts for a delightful dessert spread at parties or gatherings.
How to Perfect Monster Cookie Fudgy Brownies
To achieve the best results when making monster cookie fudgy brownies, consider these helpful tips.
- Use Room Temperature Ingredients: Ensure that your eggs and butter are at room temperature for better mixing and texture.
- Don’t Overmix: Mix your batter just until combined to keep your brownies chewy and fudgy.
- Check for Doneness: Use a toothpick to check if they are done; it should come out with moist crumbs, not clean.
- Let Them Cool: Allow the brownies to cool completely in the pan before cutting them for cleaner edges.
- Store Properly: Keep any leftovers in an airtight container at room temperature to maintain their chewy texture.
Best Side Dishes for Monster Cookie Fudgy Brownies
Pairing side dishes with monster cookie fudgy brownies can create a well-rounded dessert experience. Here are some excellent options:
- Vanilla Ice Cream: A classic choice that complements the chocolate flavors perfectly and adds creaminess.
- Fresh Fruit Salad: A mix of seasonal fruits provides freshness and balances out the richness of the brownies.
- Chocolate Milkshake: Rich and creamy, this drink pairs wonderfully, enhancing the chocolate experience.
- Coffee or Espresso: The bitterness of coffee can offset sweetness, making it an ideal accompaniment.
- Caramel Sauce: Drizzle caramel sauce over your brownies for an extra layer of sweetness.
- Nutty Granola: A crunchy side that adds texture contrast while offering some health benefits.
- Coconut Whipped Cream: For a dairy-free option, coconut whipped cream is light and flavorful, enhancing the dessert’s richness.
- Almonds or Mixed Nuts: A handful of nuts provides crunch and pairs well with chocolate flavors, creating a satisfying contrast.
Common Mistakes to Avoid
When making Monster Cookie Fudgy Brownies, it’s easy to make some common errors. Here are a few mistakes to watch out for:
-
Skipping the room temperature ingredients: Using cold eggs or butter can affect the texture of your brownies. Make sure all your ingredients are at room temperature for the best results.
-
Overmixing the batter: Overmixing can lead to dense brownies. Mix just until combined to keep them fudgy and chewy.
-
Not lining the baking pan: Failing to line your pan with parchment paper can result in brownies that stick. Always line your pan for easy removal and cleanup.
-
Underbaking or overbaking: Baking times can vary based on your oven. Check for doneness by inserting a toothpick; it should come out with a few moist crumbs.
-
Ignoring ingredient substitutions: If you need to replace an ingredient, ensure you choose compatible alternatives. For example, using vegetable oil instead of butter will change the flavor and texture.

Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container for up to 5 days.
- Place parchment paper between layers of brownies to prevent sticking.
Freezing Monster Cookie Fudgy Brownies
- Wrap individual brownies tightly in plastic wrap and place them in a freezer-safe bag.
- They can be frozen for up to 3 months without losing quality.
Reheating Monster Cookie Fudgy Brownies
- Oven: Preheat to 350°F (175°C) and warm for about 10 minutes.
- Microwave: Heat one brownie at a time on low power for about 15-20 seconds.
- Stovetop: Place a brownie in a skillet over low heat, cover, and warm for about 5 minutes.
Frequently Asked Questions
Here are some common questions about Monster Cookie Fudgy Brownies:
What makes Monster Cookie Fudgy Brownies unique?
Monster Cookie Fudgy Brownies combine rich chocolate brownies with chewy monster cookie toppings. This creates a delightful mix of textures and flavors that everyone loves.
Can I customize the toppings on my Monster Cookie Fudgy Brownies?
Absolutely! Feel free to swap out chocolate chips or M&Ms for your favorite candies or nuts. Tailoring the toppings lets you create a unique dessert every time.
How do I know when my Monster Cookie Fudgy Brownies are done baking?
Check with a toothpick inserted into the center; it should come out with some moist crumbs but not wet batter. This indicates they are perfectly fudgy!
Are these brownies suitable for sharing?
Definitely! These Monster Cookie Fudgy Brownies are perfect for parties, potlucks, or simply sharing with friends and family. They’re sure to impress!
Final Thoughts
Monster Cookie Fudgy Brownies offer an irresistible combination of chewy monster cookies atop rich brownies, making them a delightful treat for any occasion. Their versatility allows you to customize toppings easily, making this recipe fun and adaptable. Try these delicious brownies today!

Monster Cookie Fudgy Brownies
- Total Time: 1 hour
- Yield: Approximately 12 servings 1x
Description
Dive into the delightful world of Monster Cookie Fudgy Brownies—a scrumptious treat that marries rich, fudgy brownies with the chewy goodness of monster cookies. Perfect for any gathering or simply a cozy night in, these brownies are sure to impress both kids and adults alike. With their fun layers and customizable toppings, they provide a unique dessert experience that satisfies every sweet tooth.
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 (dutch process)
- 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 (room temperature)
- 1/3 cup Brown sugar (packed light or dark)
- 1/8 cup White granulated sugar
- 1/4 cup Peanut butter (creamy)
- 1 tsp Pure vanilla extract
- 1 Large egg (room temperature)
- 1/2 cup Quick oats
- 1/2 cup Mini chocolate chips
- 1/2 cup Mini M&Ms
Instructions
- Preheat your oven to 350°F (175°C). Grease your baking pan or line it with parchment paper for easy removal later.
- In a large mixing bowl, combine sugar, eggs, egg yolk, butter, oil, and vanilla extract. Mix until smooth using an electric mixer.
- Gradually add flour, cocoa powder, cornstarch, and salt. Mix until well combined. Fold in semi-sweet and milk chocolate chips.
- Pour the brownie batter into the prepared baking pan. Spread it evenly across the bottom using a rubber spatula.
- In another bowl, combine flour, cornstarch, baking soda, baking powder, and salt.
- In a separate bowl, cream together room temperature butter with brown sugar and white sugar until fluffy.
- Mix in peanut butter and vanilla extract. Add in the egg while mixing well.
- Gradually incorporate dry ingredients along with oats, mini chocolate chips, and M&Ms.
- Spoon the monster cookie mixture over the brownie layer. Spread gently to cover evenly but do not worry about perfection; some brownie showing is fine.
- Bake in preheated oven for 35-40 minutes or until a toothpick inserted comes out mostly clean (a few moist crumbs are ideal).
- Let cool completely before cutting into bars.
- Prep Time: 20 minutes
- Cook Time: 40 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 serving
- Calories: 220
- Sugar: 20g
- Sodium: 120mg
- Fat: 10g
- Saturated Fat: 4g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 30g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 30mg