Jump to Recipe Print RecipeAs I pulled the tray of warm, chocolatey goodness from the oven, the delightful aroma of freshly baked brownies and cookies enveloped my kitchen. These Monster Cookie Fudgy Brownies are a heavenly marriage of two favorites: a rich, fudgy brownie base topped with a chewy, colorful layer of monster cookie dough filled with chocolate chips and M&M’s. What’s more, this indulgent dessert is not just a showstopper for parties, but also an easy recipe to satisfy your sweet cravings at home. You’ll love how quick it comes together and how every bite offers a perfect blend of flavors and textures. So, are you ready to dive into this irresistible treat that’s sure to be your new go-to for brownies? Why are these brownies so irresistible? Layers of Flavor: The combination of a rich, fudgy brownie base and a chewy monster cookie top creates a delightful flavor explosion. Eye-Catching Treat: With vibrant M&M’s and chocolate chips, these brownies are as visually appealing as they are delicious. Quick to Make: This recipe is hassle-free, allowing you to whip up a sensational dessert in no time. Crowd-Pleaser: Perfect for gatherings, potlucks, or simply enjoying at home, everyone will crave seconds! Versatile Options: Feel free to customize with your favorite mix-ins or serve warm with a scoop of ice cream—who can resist that? For more delightful desserts, try making Sugar Cookie Truffles or Chocolate Chip Cookie Dough Twists. Cookie Fudgy Brownie Ingredients For the Brownie Base White Granulated Sugar – Adds sweetness; brown sugar can be used for a deeper flavor. Large Eggs & Egg Yolk – Provide moisture and structure; no substitutes recommended for baking integrity. Unsalted Butter – Contributes richness and flavor; use salted butter if preferred, but reduce added salt. Oil (Canola or Vegetable) – Helps create a moist brownie texture; coconut oil can substitute for a unique taste. Pure Vanilla Extract – Enhances overall flavor; almond extract can provide a different note. All-Purpose Flour – Provides structure to the brownies; can substitute with a gluten-free flour blend if needed. Unsweetened Cocoa Powder (Dutch Process) – Adds chocolate depth; regular cocoa powder can work in a pinch. Cornstarch – Improves the texture and chewiness; can be omitted for simplicity. Salt – Balances sweetness and enhances flavors; essential for both components, don’t omit. Semi-Sweet and Milk Chocolate Chips – Provide delightful chocolate bursts; dark chocolate chips are a less sweet option. For the Monster Cookie Layer Quick Oats – Adds texture to the cookies; old-fashioned oats can be used for a chewier cookie. Mini Chocolate Chips & Mini M&M’s – Offer colorful accents and flavor in the cookie layer; regular chocolate chips can substitute if necessary. Peanut Butter (Creamy) – Gives rich flavor and creaminess; sunflower seed butter or cookie butter can be used for nut-free alternatives. All-Purpose Flour – Provides structure for the cookie dough; ensure it matches the consistency needed for chewy cookies. Embrace this perfectly balanced Cookie Fudgy Brownie recipe to create an irresistible treat that’s sure to win hearts! Step‑by‑Step Instructions for Cookie Fudgy Brownies Step 1: Prepare Monster Cookie Dough In a medium bowl, whisk together flour, cornstarch, baking soda, baking powder, and salt until well combined. In a separate bowl, beat together softened butter, brown sugar, and granulated sugar until light and fluffy, about 3 minutes. Add peanut butter, vanilla extract, and an egg, mixing until smooth. Gradually incorporate the dry mixture, then fold in oats, chocolate chips, and M&M’s. Chill this monster cookie dough mixture in the refrigerator for 40 minutes, helping it firm up for easier handling later. Step 2: Make Brownie Batter Preheat your oven to 325°F (160°C) and prepare a 9×9 inch baking pan by spraying it with non-stick spray and lining it with parchment paper for easy removal. In a large bowl, sift together flour, cocoa powder, cornstarch, and salt. In another bowl, whisk together sugar, eggs, and an egg yolk for approximately 5 minutes until the mixture turns pale and fluffy, indicating it’s well-aerated. Slowly mix in melted butter, oil, and vanilla extract, then gently fold in the dry ingredients and semi-sweet chocolate chips. Step 3: Combine Layers and Bake Pour the rich brownie batter into the prepared baking pan, spreading it evenly with a spatula. Bake the brownies in the preheated oven for 15 minutes, allowing them to set slightly. From the chilled monster cookie dough, flatten small discs and gently place them atop the brownie layer, ensuring even coverage without pressing down too firmly. Return the pan to the oven and bake for an additional 25-30 minutes until the cookie layer is golden and the brownies are set but still fudgy in the center. Step 4: Cool and Slice Once baked, remove the pan from the oven and allow it to cool completely on a wire rack—this could take about 30-45 minutes. This step is crucial, as cooling helps deepen the chocolate flavors and ensures the brownies hold their shape when sliced. After they have cooled, lift the brownies out of the pan using the parchment paper and slice into squares with a sharp knife for clean edges. Enjoy the delightful combination of cookie and brownie textures! Make Ahead Options These Monster Cookie Fudgy Brownies are a fantastic option for meal prep! You can prepare the brownie batter and monster cookie dough separately up to 24 hours in advance. Simply mix the brownie batter and refrigerate it, while you chill the cookie dough mixture. When you’re ready to bake, pour the brownie batter into the pan, place the chilled cookie dough discs on top, and bake as instructed. By prepping ahead, you’ll save time and ensure a quick treat that’s just as delicious as when freshly made. Make sure to store the brownie batter and cookie dough in airtight containers to maintain their quality before combining them for baking! How to Store and Freeze Cookie Fudgy Brownies Airtight Container: Store Cookie Fudgy Brownies in an airtight container at room temperature for up to 5 days to maintain their fudgy texture and flavor. Refrigeration: For extended freshness, refrigerate the brownies; they can last up to 1 week when properly sealed. Freezing: Freeze brownies wrapped tightly in plastic wrap and then in aluminum foil for up to 3 months. Thaw at room temperature when ready to enjoy again. Reheating: To enjoy warm brownies, microwave them for 10-15 seconds. This will revive the fudgy and chewy goodness, making them irresistible! What to Serve with Monster Cookie Fudgy Brownies? Indulging in a slice of these fluffy, fudgy treats calls for the perfect accompaniments to elevate your dessert experience. Vanilla Ice Cream: This classic pairing adds a creamy, cold contrast that melts into the warm brownies, creating a heavenly bite. Fresh Berries: A burst of tartness from strawberries or raspberries cuts through the richness, balancing flavors and adding a touch of freshness. Chocolate Sauce: Drizzling this rich sauce over the top intensifies the chocolate flavor, allowing each bite to become even more decadent. Whipped Cream: Light and airy, homemade whipped cream adds a fluffy layer that complements the chewy, fudgy brownies perfectly. Coffee or Espresso: The robust flavors of coffee enhance the chocolate notes in the brownies, making for a delightful pairing after dinner. Milkshakes: Blend vanilla or chocolate milkshakes for a nostalgic treat that pairs beautifully with each chocolatey bite of these cookies. Nutella Spread: A generous dollop of this rich hazelnut spread makes for an indulgent boost of flavor, perfect for those who desire extra chocolatey goodness. Caramel Sauce: Sweet and gooey, caramel drizzled over these brownies adds depth and a touch of luxury to your dessert experience. Coconut Flakes: Toasted coconut sprinkled on top adds a delightful chewy texture and a tropical twist that brightens up this scrumptious treat. Expert Tips for Cookie Fudgy Brownies Chill Dough: Chilling the monster cookie dough is essential for better texture and easier handling. Don’t skip this step! Check Doneness: Avoid cutting into brownies too soon; they may look undercooked at first. Let them cool completely to set properly. Layer Gently: When adding the cookie layer, place it gently on top of the brownie base without pressing down too hard to maintain the right textures. Mix-Ins Matter: Customize your Cookie Fudgy Brownies by experimenting with different mix-ins like nuts or dried fruit, enhancing flavor variety. Cutting Technique: Use a sharp knife to slice the brownies after cooling for clean edges that showcase both layers beautifully. Cookie Fudgy Brownie Variations Feel free to make these Monster Cookie Fudgy Brownies your own with these delightful twists and substitutions! Nut-Free: Replace peanut butter with cookie butter or sunflower seed butter to accommodate nut allergies while keeping the flavor rich. Burst of Flavor: Add flavored chips like butterscotch or white chocolate to your cookie layer for an extra hint of sweetness. Oaty Goodness: Swap quick oats with old-fashioned oats for a chewier texture that complements the brownies beautifully. Add Some Heat: Sprinkle in a pinch of cayenne or red pepper flakes to the brownie batter for a subtle spicy kick. It’s an unexpected but delightful surprise! Fruity Delight: Mix in chopped dried fruits like cranberries or cherries to bring a chewy, tart contrast against the sweet chocolatey layers. Gourmet Touch: Drizzle melted chocolate or caramel over cooled brownies for an indulgent finish before slicing. It elevates every bite to new heights! Chocolate Lovers: Experiment with dark chocolate chips instead of semi-sweet for a bold and less sweet chocolate experience. It’s rich and divine! Swap the Flour: If gluten-free, use a gluten-free flour blend in both the brownie base and cookie dough for an equally delicious treat without the gluten. These variations promise a playful spin on the classic, allowing you to enjoy your Monster Cookie Fudgy Brownies uniquely every time. For more sweet inspiration, you may want to try crafting some Peanut Butter Brownies or indulging in some Cookie Butter Cake! Monster Cookie Fudgy Brownies Recipe FAQs How should I select my ingredients for the best results? Absolutely! For the best flavor and texture, ensure your butter is at room temperature to achieve that perfect creamy consistency when mixing. When choosing chocolate chips, look for high-quality brands that promise rich chocolate flavor. For eggs, fresh is key—use large eggs for the right moisture content. And don’t forget about your oats; quick oats work best for a chewy cookie layer, but old-fashioned oats can be a delightful alternative if you prefer a heartier texture! How should I store my Monster Cookie Fudgy Brownies? You can store your brownies in an airtight container at room temperature for up to 5 days to keep them fudgy and delicious. If you’d like them to last longer, refrigerate them instead; they can remain fresh for about a week. Just remember to let them cool completely before sealing to avoid excess moisture buildup. Can I freeze my brownies? If so, how? Yes, you absolutely can freeze your brownies! Just wrap individual pieces tightly in plastic wrap, making sure there are no air pockets, then place them in a resealable plastic bag or aluminum foil for double protection. They will keep well in the freezer for up to 3 months. When you’re ready to indulge again, simply thaw them at room temperature for a few hours, or pop them in the microwave for 10-15 seconds to enjoy that warm, fudgy goodness just like fresh out of the oven! What can I do if my brownies turn out too cakey? Very! If your brownies seem more cakey than fudgy, it might be due to over-mixing the batter or a slight excess of flour. To achieve that rich, fudgy texture, ensure you mix the ingredients just until combined. Use a light hand when folding in dry ingredients and avoid overbaking; they should still be slightly soft in the center when you take them out of the oven. If you find that they are already baked, adding a scoop of ice cream or some warm sauce when serving can beautifully enhance the experience! Are there any dietary considerations I should be aware of for my guests? Absolutely! If you or your guests have allergies, be mindful of the peanut butter in the cookie layer—consider substituting with sunflower seed butter or a nut-free spread. For gluten-free guests, opt for a gluten-free flour blend in both the brownie and cookie layers. Always check labels of your chocolate chips to accommodate any dairy sensitivities, and feel free to explore dairy-free chocolate options for a completely inclusive dessert. Can I add mix-ins or tweak the flavors? Definitely! The beauty of these Monster Cookie Fudgy Brownies rests in their versatility. You can customize your treats with your favorite mix-ins like dried fruit, nuts, or even different flavored chips—think butterscotch or white chocolate! For added texture, consider throwing in a handful of chopped nuts or crumbled cookies. Have fun experimenting to make these brownies uniquely yours! Indulge in Cookie Fudgy Brownies for Ultimate Sweet Bliss These Cookie Fudgy Brownies are a delicious marriage of rich brownie base and colorful monster cookie layer, perfect for satisfying sweet cravings. Print Recipe Pin Recipe Prep Time 40 minutes minsCook Time 40 minutes minsCooling Time 45 minutes minsTotal Time 2 hours hrs 5 minutes mins Servings: 16 slicesCourse: DessertsCuisine: AmericanCalories: 250 Ingredients Equipment Method Nutrition Notes Ingredients 1x2x3x? For the Brownie Base1 cup White Granulated Sugar2 large Large Eggs1 large Egg Yolk1 cup Unsalted Butter or salted butter1/2 cup Oil (Canola or Vegetable) or coconut oil2 teaspoons Pure Vanilla Extract1 cup All-Purpose Flour or gluten-free flour blend1/2 cup Unsweetened Cocoa Powder (Dutch Process) regular cocoa powder can work1 tablespoon Cornstarch optional1/2 teaspoon Salt essential for both components1/2 cup Semi-Sweet Chocolate Chips1/2 cup Milk Chocolate Chips or dark chocolate chipsFor the Monster Cookie Layer1 cup Quick Oats or old-fashioned oats1/2 cup Mini Chocolate Chips or regular chocolate chips1/2 cup Mini M&M's1/2 cup Peanut Butter (Creamy) or nut-free alternatives1 cup All-Purpose Flour Equipment Medium BowlLarge bowl9x9 inch baking panSpatulawire rack Method Step-by-step InstructionsIn a medium bowl, whisk together flour, cornstarch, baking soda, baking powder, and salt until well combined. In a separate bowl, beat together softened butter, brown sugar, and granulated sugar until light and fluffy, about 3 minutes. Add peanut butter, vanilla extract, and an egg, mixing until smooth. Gradually incorporate the dry mixture, then fold in oats, chocolate chips, and M&M's. Chill this monster cookie dough mixture in the refrigerator for 40 minutes.Preheat your oven to 325°F (160°C) and prepare a 9x9 inch baking pan by spraying it with non-stick spray and lining it with parchment paper. In a large bowl, sift together flour, cocoa powder, cornstarch, and salt. In another bowl, whisk together sugar, eggs, and an egg yolk for approximately 5 minutes until pale and fluffy. Slowly mix in melted butter, oil, and vanilla extract, then gently fold in the dry ingredients and chocolate chips.Pour the brownie batter into the prepared baking pan, spreading it evenly. Bake the brownies for 15 minutes. From the chilled cookie dough, flatten small discs and place them atop the brownie layer. Return the pan to the oven and bake for an additional 25-30 minutes until the cookie layer is golden and the brownies are set but fudgy in the center.Once baked, remove the pan and allow it to cool completely on a wire rack for about 30-45 minutes. This helps deepen the chocolate flavors and ensures the brownies hold their shape when sliced. After cooling, lift the brownies out of the pan using the parchment paper and slice into squares. Nutrition Serving: 1sliceCalories: 250kcalCarbohydrates: 36gProtein: 3gFat: 12gSaturated Fat: 7gPolyunsaturated Fat: 1gMonounsaturated Fat: 4gCholesterol: 40mgSodium: 150mgPotassium: 150mgFiber: 1gSugar: 20gVitamin A: 200IUCalcium: 20mgIron: 1mg NotesChill cookie dough for better texture. Cut brownies only after cooling for best results. Tried this recipe?Let us know how it was!