Monster Cookie Fudgy Brownies

Published: October 7, 2025

by Amelia

Why You’ll Love This Recipe

Irresistible Flavor: The blend of fudgy brownie and chewy cookie creates a unique dessert experience.
Easy to Make: With simple steps and common ingredients, this recipe is beginner-friendly.
Versatile Treat: Perfect for birthdays, movie nights, or just an afternoon snack.
Customizable Toppings: Feel free to swap in your favorite candies or nuts for a personal touch.
Great for Sharing: Cut into bars, these brownies are easy to share with friends and family.

Tools and Preparation

Before you start baking your Monster Cookie Fudgy Brownies, gather the necessary tools. Having everything ready will make the process smoother and more enjoyable.

Essential Tools and Equipment

Mixing bowls
Measuring cups
Measuring spoons
Baking pan (9×13 inch)
Rubber spatula or wooden spoon
Whisk

Importance of Each Tool

Mixing bowls: These are essential for combining your ingredients smoothly without mess.
Baking pan: A 9×13 inch pan ensures even baking for your fudgy brownies.
Rubber spatula or wooden spoon: These tools are perfect for mixing thick batter and scraping down the sides of bowls.

Ingredients

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

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

Step 1: Preheat the Oven

Preheat your oven to 350°F (175°C). This ensures that your brownies bake evenly.

Step 2: Prepare the Brownie Batter

In a large mixing bowl:
1. Combine the white granulated sugar, unsalted butter, oil, eggs, egg yolk, and pure vanilla extract. Mix until well blended.
2. In another bowl, whisk together all-purpose flour, cocoa powder, cornstarch, and salt.
3. Gradually add dry ingredients to the wet mixture. Stir until just combined.
4. Fold in semi-sweet and milk chocolate chips.

Step 3: Bake the Brownie Layer

Pour brownie batter into a greased 9×13 inch baking pan. Spread it evenly using a rubber spatula. Bake in preheated oven for about 25 minutes.

In a separate bowl:
1. Mix together all-purpose flour, cornstarch, baking soda, baking powder, and salt.
2. In another bowl, cream together room temperature unsalted butter, brown sugar, white granulated sugar, peanut butter, pure vanilla extract, and egg until smooth.
3. Gradually add the dry mixture into the wet mixture until fully incorporated.
4. Stir in quick oats, mini chocolate chips, and mini M&Ms.

Step 5: Assemble and Bake

Once brownie layer is baked:
1. Spoon dollops of monster cookie batter over the brownie layer.
2. Spread gently with a spatula to cover as much as possible without mixing layers.
3. Return to oven for an additional 15-20 minutes until edges are set but center remains soft.

Step 6: Cool and Serve

Allow brownies to cool completely in the pan before cutting into bars. Enjoy these delicious Monster Cookie Fudgy Brownies!

These Monster Cookie Fudgy Brownies are a delightful treat that can be served in various ways to enhance your dessert experience. Here are some creative serving suggestions to make the most of this delicious dessert.

A la Mode

Top your brownies with a scoop of vanilla ice cream for a classic and creamy combination. The cold ice cream contrasts beautifully with the warm brownies.

Drizzled with Chocolate Sauce

Add an indulgent touch by drizzling warm chocolate sauce over your fudgy brownies. This extra layer of chocolate makes each bite even richer.

With Fresh Berries

Serve with a side of fresh berries like strawberries or raspberries. The tartness of the berries balances the sweetness of the brownies perfectly.

Whipped Cream Topping

A dollop of freshly whipped cream on top adds a light and fluffy element, making every forkful feel extra special.

Pair with Coffee

Enjoy your brownies alongside a cup of coffee or espresso. The bitterness of the coffee complements the sweetness of the brownies beautifully.

To achieve the perfect Monster Cookie Fudgy Brownies, follow these helpful tips for optimal results.

Use room temperature ingredients: Ensure that your eggs and butter are at room temperature for better mixing and texture in your batter.
Measure flour correctly: Spoon and level your flour instead of scooping it directly from the bag. This prevents dense brownies.
Don’t overmix: Mix just until combined to keep your brownies fudgy rather than cakey.
Chill before cutting: Allow the brownies to cool completely before cutting them into bars. This helps maintain their shape and makes slicing easier.
Customize toppings: Feel free to experiment with different mix-ins like nuts or dried fruits for added texture and flavor.

Pairing side dishes with your Monster Cookie Fudgy Brownies can elevate your dessert experience. Here are some great options to consider:

Vanilla Ice Cream – A classic pairing that adds creaminess and complements the richness of the brownies.
Chocolate Mousse – Light yet decadent, this mousse enhances the chocolate flavor and adds a delightful texture.
Fresh Fruit Salad – A refreshing mix of seasonal fruits provides a bright contrast to the fudgy brownies.
Chocolate Pudding – For true chocolate lovers, serving alongside rich chocolate pudding creates an indulgent experience.
Caramel Sauce – A drizzle of caramel sauce brings a sweet, buttery flavor that pairs wonderfully with chocolate.
Milkshake – Blend up a thick milkshake for a nostalgic companion that makes each bite more enjoyable.

Common Mistakes to Avoid

Baking can be tricky, especially when creating delicious Monster Cookie Fudgy Brownies. Here are some common mistakes to avoid for the best results.

Using cold ingredients: Ensure eggs and butter are at room temperature for better mixing and texture.
Overmixing the batter: Mix just until combined to keep brownies fudgy and prevent them from becoming tough.
Incorrect oven temperature: Always preheat your oven. An incorrect temperature can lead to uneven baking.
Skipping the parchment paper: Line your baking dish with parchment to make removing the brownies easier after baking.
Not cooling before cutting: Allow your brownies to cool completely for clean cuts and improved texture.

Storage & Reheating Instructions

Refrigerator Storage

Store in an airtight container for up to 5 days.
Place parchment paper between layers if stacking to prevent sticking.

Wrap individually in plastic wrap before placing in a freezer-safe bag.
They can be frozen for up to 3 months.

Oven: Preheat to 350°F (175°C). Heat brownies wrapped in foil for about 10 minutes.
Microwave: Warm a brownie on a microwave-safe plate for about 15-20 seconds for a gooey treat.
Stovetop: Place a non-stick pan over low heat and warm brownies, flipping occasionally until warmed through.

Frequently Asked Questions

Here are some frequently asked questions regarding Monster Cookie Fudgy Brownies that might help you with your baking journey.

The brownies are done when the edges look firm while the center remains slightly soft. A toothpick inserted should come out with a few moist crumbs.

Absolutely! You can add nuts, different types of chocolate chips, or even swap peanut butter for almond butter based on your preference.

What is the best way to cut my brownies?

Use a sharp knife and clean it between cuts. This ensures neat squares without tearing the fudgy texture.

Can I use gluten-free flour for these brownies?

Yes, you can substitute all-purpose flour with a gluten-free blend. Just ensure it includes xanthan gum for proper structure.

Final Thoughts

These Monster Cookie Fudgy Brownies are not only rich but also versatile, making them perfect for any occasion. Feel free to customize them with your favorite mix-ins or toppings. Give this recipe a try, and indulge in a delightful dessert that combines two favorites into one delicious treat!

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Monster Cookie Fudgy Brownies

Why You’ll Love This Recipe