Monster Cookie Fudgy Brownies
If you’re looking for a dessert that combines the best of both worlds, then you’ve stumbled upon the right recipe! These Monster Cookie Fudgy Brownies are a delightful treat that brings together rich, fudgy brownies and chewy monster cookies. This recipe is a favorite in my home because it’s perfect for any occasion—whether it’s a busy weeknight or a festive family gathering, everyone will love these sweet bars.
What makes this dessert truly special is how wonderfully they come together. The layers meld perfectly, offering a gooey texture that makes each bite feel like a warm hug. Plus, they’re so easy to whip up; you’ll find yourself reaching for this recipe time and time again.
Why You’ll Love This Recipe
- Deliciously Decadent: The combination of fudgy brownies and chewy cookies creates a dessert experience that’s hard to resist!
- Family-Friendly Fun: Kids and adults alike will enjoy these brownie bars—perfect for sharing or keeping all to yourself!
- Easy to Make: With simple steps and straightforward ingredients, you can have these baked in no time.
- Versatile Treat: Great for parties, potlucks, or just because; they’re sure to be a hit wherever you take them.
- Make-Ahead Friendly: Prepare these brownies ahead of time and store them for later enjoyment—if they last that long!

Ingredients You’ll Need
Let’s gather our simple, wholesome ingredients for these Monster Cookie Fudgy Brownies. You might already have many of these staples in your pantry!
For the Fudgy 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 Cookies
- 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
Variations
This recipe is quite flexible! Feel free to mix things up based on what you have on hand or your personal preferences.
- Add Nuts: Toss in some chopped nuts like walnuts or pecans for an extra crunch.
- Try Different Chips: Use white chocolate chips or butterscotch chips instead of chocolate chips for unique flavors.
- Go Gluten-Free: Substitute all-purpose flour with a gluten-free blend to make this treat suitable for gluten-sensitive friends.
- Mix in Dried Fruit: Add raisins or cranberries for a fruity twist that balances out the sweetness.
How to Make Monster Cookie Fudgy Brownies
Step 1: Preheat the Oven
Start by preheating your oven to 350°F (175°C). This step ensures your brownies bake evenly and thoroughly.
Step 2: Prepare the Brownie Batter
In a large mixing bowl, combine the white granulated sugar, eggs, egg yolk, unsalted butter, oil, and vanilla extract. Beat until smooth. Then add the all-purpose flour, cocoa powder, cornstarch, salt, and fold in both semi-sweet and milk chocolate chips. Mixing well here is crucial; you want every bit of dry ingredient incorporated into that luscious batter.
Step 3: Bake the Brownies
Pour your brownie batter into a greased baking dish. Spread it out evenly so it bakes uniformly. Bake in your preheated oven for about 20 minutes while you prepare the monster cookie dough.
Step 4: Make the Monster Cookies
In another bowl, cream together room temperature butter with brown sugar and white sugar until fluffy. Add peanut butter and continue mixing until combined. Beat in the vanilla extract and egg. In another bowl, whisk together flour, cornstarch, baking soda, baking powder, and salt before gradually incorporating it into the wet mixture along with quick oats. Finally, fold in mini chocolate chips and mini M&Ms.
Step 5: Layer & Finish Baking
Once your brownie layer has baked for about 20 minutes, remove it from the oven. Gently spread the monster cookie dough over the top of the brownies. Return them to the oven and bake for an additional 20 minutes or until a toothpick comes out clean from the brownie layer.
Step 6: Cool & Slice
Allow your creation to cool completely in the pan before slicing into generous bars. This waiting period helps everything set nicely! Enjoy sharing—or savoring—all on your own!
Pro Tips for Making Monster Cookie Fudgy Brownies
Making these monster cookie fudgy brownies is a delightful experience, and a few simple tips can take your baking to the next level!
- Use room temperature ingredients: Having your eggs and butter at room temperature helps them blend more smoothly, resulting in a light and fluffy brownie base that bakes evenly.
- Don’t overmix the batter: Mixing just until combined keeps the texture fudgy and prevents your brownies from becoming tough. A few lumps are perfectly fine!
- Chill the dough: If you have time, chilling the monster cookie dough for about 30 minutes before layering it on top of the brownie mix allows the flavors to meld beautifully and helps them hold their shape while baking.
- Check for doneness with a toothpick: Insert a toothpick into the center of your brownies; if it comes out with a few moist crumbs, they’re done. This ensures you don’t overbake and lose that gooey texture!
- Let them cool completely before cutting: Allowing the brownies to cool in the pan ensures cleaner cuts, giving you those beautiful squares that are perfect for sharing (or keeping all to yourself).
How to Serve Monster Cookie Fudgy Brownies
These monster cookie fudgy brownies are as delightful to look at as they are to eat! Presenting them well can make all the difference when serving guests or enjoying them at home.
Garnishes
- Whipped coconut cream: A dollop of whipped coconut cream adds a light, airy finish that complements the rich brownies beautifully.
- Chocolate drizzle: A simple drizzle of melted chocolate on top elevates their appearance and enhances the chocolate flavor.
Side Dishes
- Vanilla ice cream: The creamy texture and coolness of vanilla ice cream create a delicious contrast with warm fudgy brownies—pure bliss!
- Fresh berries: A side of fresh strawberries or raspberries adds a fruity tartness that balances the sweetness of the brownies.
- Caramel sauce: Drizzling some caramel sauce over your brownies takes this dessert to another level, adding richness and decadence that’s hard to resist.
- Coffee or espresso: Pairing these brownies with a cup of coffee or espresso enhances their chocolatey flavor, making for an indulgent treat any time of day.
Now you’re all set to bake these delightful monster cookie fudgy brownies! Happy baking!

Make Ahead and Storage
These Monster Cookie Fudgy Brownies are perfect for meal prep! You can whip up a batch ahead of time and enjoy them throughout the week or share them with friends and family.
Storing Leftovers
- Allow the brownies to cool completely.
- Cut into bars and store in an airtight container.
- Keep at room temperature for up to 3 days or refrigerate for up to a week.
Freezing
- Wrap individual brownie bars in plastic wrap or aluminum foil.
- Place wrapped brownies in a freezer-safe bag or container.
- Freeze for up to 3 months. When ready to enjoy, thaw in the refrigerator overnight.
Reheating
- To reheat, place a brownie bar on a microwave-safe plate.
- Microwave in 10-15 second intervals until warm.
- Enjoy with a scoop of your favorite non-dairy ice cream for an extra treat!
FAQs
If you have questions about this recipe, you’re not alone! Here are some common inquiries:
Can I make substitutions in the Monster Cookie Fudgy Brownies recipe?
Absolutely! You can swap out ingredients based on what you have on hand. For example, use almond butter instead of peanut butter, or try gluten-free flour blends if you’re avoiding gluten.
How do I know when my Monster Cookie Fudgy Brownies are done baking?
You’ll know your brownies are ready when the edges look set and the center has a slight jiggle. A toothpick inserted should come out with a few moist crumbs but not wet batter.
What’s the best way to cut Monster Cookie Fudgy Brownies?
For clean cuts, allow the brownies to cool completely. Use a sharp knife dipped in hot water, wiping it clean between cuts for neat edges.
Can I add nuts to my Monster Cookie Fudgy Brownies?
Yes! Feel free to mix in your favorite nuts like walnuts or pecans for added crunch and flavor.
Final Thoughts
I hope you enjoy making these delightful Monster Cookie Fudgy Brownies as much as I do! They’re rich, chewy, and packed with flavor—a truly special treat perfect for any occasion. Whether you’re enjoying them at home, sharing with friends, or serving at gatherings, these brownies are sure to impress. Happy baking!
Monster Cookie Fudgy Brownies
Indulge in the delightful fusion of rich, fudgy brownies and chewy monster cookies with these Monster Cookie Fudgy Brownies. This irresistible dessert features layers of gooey chocolate goodness topped with a cookie crust studded with mini chocolate chips and colorful candies. Perfect for any occasion, from busy weeknights to festive gatherings, these brownies are sure to please both kids and adults alike. With simple ingredients and straightforward steps, you’ll want to make this tasty treat time and time again!
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Total Time: 55 minutes
- Yield: Approximately 12 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 (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).
- In a large bowl, mix together sugar, eggs, butter, oil, and vanilla until smooth. Stir in flour, cocoa powder, cornstarch, salt, and both types of chocolate chips until well combined.
- Pour brownie batter into a greased baking dish and bake for about 20 minutes.
- For the cookie layer, cream together softened butter with sugars and peanut butter; mix in vanilla and egg. In another bowl, combine flour, cornstarch, baking soda, baking powder, and salt; add to wet mixture along with oats and chocolate chips.
- Spread cookie dough over baked brownies and return to the oven for an additional 20 minutes or until set.
- Allow to cool before slicing into bars.
Nutrition
- Serving Size: 1 brownie bar (55g)
- Calories: 215
- Sugar: 18g
- Sodium: 135mg
- Fat: 10g
- Saturated Fat: 4g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 30g
- Fiber: 1g
- Protein: 3g
- Cholesterol: 35mg
