These Monster Cookie Fudgy Brownies are the perfect treat for any occasion, combining a rich, fudgy brownie layer with a chewy monster cookie topping. They are fantastic for parties, family gatherings, or just an indulgent dessert at home. The unique combination of flavors and textures makes these brownies a standout choice that everyone will love.
Why You’ll Love This Recipe
- Decadent Flavor: Enjoy the delicious blend of chocolate brownie and cookie dough that creates a rich taste experience.
- Easy to Make: This recipe is straightforward and requires common ingredients, making it perfect for bakers of all levels.
- Versatile Treat: Perfect for celebrations or an everyday dessert, these brownies can be customized with your favorite mix-ins.
- Crowd-Pleaser: These bars are sure to impress friends and family, making them a hit at any gathering.
- Satisfying Texture: The fudgy base paired with the chewy cookie topping provides a delightful mouthfeel.
Tools and Preparation
Before you start baking, gather your tools to ensure a smooth process. Having everything ready will help you create these Monster Cookie Fudgy Brownies without any hitches.
Essential Tools and Equipment
- Mixing bowls
- Whisk
- Baking pan (9×13 inches)
- Parchment paper
- Measuring cups and spoons
Importance of Each Tool
- Mixing bowls: A variety of sizes help keep ingredients organized during preparation.
- Baking pan: A 9×13 inch pan ensures even cooking and allows for easy cutting into bars.
- Parchment paper: Lining your baking pan with parchment prevents sticking and simplifies cleanup.

Ingredients
For the Brownie Layer
- 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&M’s
How to Make Monster Cookie Fudgy Brownies
Step 1: Preheat the Oven
Preheat your oven to 350°F (175°C). This step is crucial for ensuring that your brownies bake evenly.
Step 2: Prepare the Baking Pan
Line a 9×13 inch baking pan with parchment paper, leaving some overhang on the sides. This makes it easy to lift out the brownies once they’re baked.
Step 3: Make the Brownie Batter
In a mixing bowl, combine:
* 5 TBSP unsalted butter (melted)
* 1 1/3 cup white granulated sugar
Whisk until smooth. Then add:
* 2 large eggs
* 1 egg yolk
* 1/3 cup oil
* 1 tsp pure vanilla extract
Continue mixing until well combined. In another bowl, sift together:
* ½ cup all-purpose flour
* ¾ cup unsweetened cocoa powder
* ¼ tsp salt
* 1 TBSP cornstarch
Gradually fold dry ingredients into wet mixture. Finally, stir in:
* ½ cup semi-sweet chocolate chips
* ½ cup milk chocolate chips
Pour the brownie batter into the prepared pan.
Step 4: Prepare the Monster Cookie Batter
In a separate bowl, cream together:
* ¼ cup unsalted butter
* ⅓ cup brown sugar
Add:
* ⅛ cup white granulated sugar
* ¼ cup creamy peanut butter
Blend until fluffy. Then mix in:
* ½ large room-temperature egg
* ⅓ tsp pure vanilla extract
In another bowl, combine:
* ½ cup all-purpose flour
* ½ tsp baking soda
* ⅛ tsp baking powder
Add this mixture to the wet ingredients along with:
* ½ cup quick oats
Mix until fully combined before stirring in:
* ½ cup mini chocolate chips
* ½ cup mini M&M’s
Step 5: Assemble and Bake
Spread the monster cookie batter evenly over the brownie layer in the pan. Bake for about 40 minutes, or until a toothpick inserted comes out mostly clean. Allow cooling completely before lifting out using parchment overhangs and cutting into bars.
Enjoy your delightful Monster Cookie Fudgy Brownies!
How to Serve Monster Cookie Fudgy Brownies
These Monster Cookie Fudgy Brownies are not only delicious but also versatile. You can serve them in various ways to enhance their flavor and appeal.
Individual Brownie Bars
- Serve each brownie bar warm, allowing the chocolate chips to be melty and gooey for a delightful texture.
À La Mode
- Top the brownies with a scoop of your favorite vanilla ice cream. The cold ice cream pairs perfectly with the warm, fudgy brownies.
Drizzled with Chocolate Sauce
- Add an extra layer of indulgence by drizzling chocolate sauce over the brownies before serving. This will create a visually appealing dessert.
With Fresh Berries
- Pairing these brownies with fresh strawberries or raspberries provides a refreshing contrast to the rich flavors.
On a Dessert Platter
- Cut the brownies into bite-sized pieces and arrange them on a platter with other desserts for a fun dessert table or party treat.
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: This helps in achieving a smooth batter that mixes more evenly.
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Don’t overmix the batter: Stir just until combined to keep the brownies fudgy and moist.
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Chill before cutting: Allowing the brownies to cool completely makes cutting easier and helps maintain their shape.
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Experiment with mix-ins: Feel free to add nuts or different types of chocolates for added flavors and textures.
Best Side Dishes for Monster Cookie Fudgy Brownies
Monster Cookie Fudgy Brownies can be complemented by several side dishes that enhance their sweetness and richness. Here are some great options:
-
Fresh Fruit Salad
A mix of seasonal fruits adds freshness and balances out the sweetness of the brownies. -
Whipped Cream
Lightly sweetened whipped cream provides a creamy contrast that complements the dense texture of the brownies. -
Chocolate-Covered Strawberries
These add an elegant touch and enhance the chocolate flavor already present in the brownies. -
Milkshakes
A classic vanilla or chocolate milkshake pairs perfectly, creating a nostalgic dessert experience. -
Coffee or Espresso
Serving these brownies with coffee enhances their rich flavors, making it an excellent end to any meal. -
Caramel Sauce
Drizzling caramel sauce over your brownie bars adds a sweet, buttery flavor that complements their fudginess.
Common Mistakes to Avoid
Baking can be tricky, especially when making these delicious Monster Cookie Fudgy Brownies. Here are some common mistakes to keep in mind.
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Bold Measurement Errors: Using incorrect measurements can ruin your brownies. Always double-check your ingredients with precise measuring tools.
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Bold Overmixing Batter: Mixing too much can lead to tough brownies. Stir just until combined for a fudgy texture.
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Bold Ignoring Oven Temperature: Baking at the wrong temperature affects cooking time. Ensure your oven is preheated and accurate for best results.
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Bold Skipping the Cooling Time: Cutting into warm brownies can make them fall apart. Let them cool completely before slicing for perfect bars.
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Bold Not Using Quality Ingredients: The flavor depends on the quality of ingredients. Use fresh eggs, good chocolate, and pure vanilla for the best taste.

Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container.
- They last up to 5 days in the refrigerator.
Freezing Monster Cookie Fudgy Brownies
- Wrap individual brownies in plastic wrap.
- Place them in a freezer-safe bag or container.
- They can be frozen for up to 3 months.
Reheating Monster Cookie Fudgy Brownies
- Oven: Preheat to 350°F (175°C) and heat for about 10 minutes.
- Microwave: Heat one brownie at a time for 15-20 seconds for a warm treat.
- Stovetop: Place in a skillet over low heat, covered, until warmed through.
Frequently Asked Questions
Here are some frequently asked questions about Monster Cookie Fudgy Brownies that might help you with your baking journey.
Can I use different types of chocolate chips?
Yes! You can mix semi-sweet and milk chocolate chips or even use white chocolate chips for a fun twist.
How do I make these brownies gluten-free?
Substitute all-purpose flour with gluten-free flour blends to accommodate gluten sensitivities while enjoying these delightful brownies.
What variations can I try with Monster Cookie Fudgy Brownies?
Consider adding nuts, dried fruits, or swapping peanut butter with almond butter for unique flavors!
How long do Monster Cookie Fudgy Brownies last?
When stored correctly, they last about 5 days in the refrigerator and up to 3 months in the freezer.
Final Thoughts
These Monster Cookie Fudgy Brownies are a delightful dessert that combines rich brownie layers with chewy cookie goodness. They’re perfect for parties or as an everyday treat! Feel free to customize them by adding your favorite mix-ins or toppings. Enjoy baking this versatile dessert!
Monster Cookie Fudgy Brownies
Indulge your sweet tooth with these delightful Monster Cookie Fudgy Brownies! Combining a rich, fudgy brownie base with a chewy monster cookie topping, this treat is perfect for any occasion—from family gatherings to cozy nights at home. The blend of flavors and textures will leave everyone asking for more. Easy to make and highly customizable, you can add your favorite mix-ins or toppings to create a unique dessert experience. These brownies are sure to impress and satisfy every chocolate lover’s cravings!
- Prep Time: 20 minutes
- Cook Time: 40 minutes
- Total Time: 1 hour
- Yield: Approximately 12 servings 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
Ingredients
- 1 1/3 cup white granulated sugar
- 2 large eggs
- 5 tbsp unsalted butter
- 1/3 cup oil (canola or vegetable)
- 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 (for monster cookie layer)
- 1 tsp cornstarch (for monster cookie layer)
- 1/2 tsp baking soda (for monster cookie layer)
- 1/8 tsp baking powder (for monster cookie layer)
- 1/4 cup unsalted butter (room temperature, for monster cookie layer)
- 1/3 cup brown sugar (packed light or dark, for monster cookie layer)
- 1/8 cup white granulated sugar (for monster cookie layer)
- 1/4 cup peanut butter (creamy, for monster cookie layer)
- 1 tsp pure vanilla extract (for monster cookie layer)
- 1 large egg (room temperature, for monster cookie layer)
- 1/2 cup quick oats (for monster cookie layer)
- 1/2 cup mini chocolate chips (for monster cookie layer)
- 1/2 cup mini M&M's (for monster cookie layer)
Instructions
- Preheat your oven to 350°F (175°C) and line a 9×13 inch baking pan with parchment paper.
- In a bowl, mix melted butter and sugar until smooth, then add eggs, oil, and vanilla.
- Combine dry ingredients separately, then fold into the wet mixture along with chocolate chips.
- For the monster cookie layer, cream together butter, sugars, peanut butter, and egg; mix in dry ingredients and oats until well combined.
- Spread the monster cookie batter over the brownie layer in the pan.
- Bake for about 40 minutes until a toothpick comes out mostly clean. Allow cooling before cutting into bars.
Nutrition
- Serving Size: 1 brownie (64g)
- Calories: 290
- Sugar: 22g
- Sodium: 120mg
- Fat: 14g
- Saturated Fat: 7g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 38g
- Fiber: 2g
- Protein: 5g
- Cholesterol: 40mg
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