The Everything Cookie

Welcome to the ultimate guide to crafting the most irresistible, giant monster cookies! These aren’t just any cookies; they’re a delightful amalgamation of everything you love in a sweet treat, packed with creamy peanut butter, wonderfully chewy rolled oats, rich chocolate chips, sweet butterscotch chips, and vibrant M&M’s. Each bite offers a symphony of textures and flavors, making them an absolute crowd-pleaser for every age and occasion. Whether you’re a seasoned baker or just starting out, this easy-to-follow, one-bowl recipe promises a truly epic cookie experience.

Stack of 4 monster cookies on a plate, showcasing their generous size and abundant mix-ins.

There’s something incredibly satisfying about a cookie that delivers on every front—chewiness, crunchiness, sweetness, and a burst of diverse flavors. Inspired by classic baking wisdom, these monster cookies take the best elements from various beloved recipes and combine them into one magnificent creation. The process is surprisingly straightforward, especially when utilizing a stand mixer, making it perfect for busy bakers. You’ll find yourself returning to this recipe again and again, eager to share these delicious, satisfying cookies with friends and family.

Why Our Monster Cookies Are a Must-Bake

These monster cookies aren’t just a dessert; they’re an experience. Here’s why they’re destined to become your new favorite:

  • Unforgettably Chewy Texture: The combination of tender rolled oats and rich peanut butter creates an incredibly satisfying chew. Each bite also offers a delightful contrast with the slight crunch of peanuts from the chunky peanut butter and the melt of chocolate.
  • Bursting with Flavorful Add-Ins: What makes a monster cookie truly monstrous? Its generous mix of ingredients! This recipe includes classic semi-sweet chocolate chips, sweet butterscotch chips, and colorful M&M’s, ensuring a delightful surprise in every morsel. There’s a perfect balance of sweet and nutty flavors that harmoniously blend together.
  • A Homage to Cookie Classics: These monster cookies cleverly fuse the best attributes of traditional peanut butter cookies, hearty oatmeal cookies, and fun M&M cookies. They capture the nostalgic comfort of familiar favorites while presenting them in an exciting, multi-layered format. It’s the perfect cookie for when you can’t decide which classic cookie to make!
  • Guaranteed to Be a Family Favorite: From the youngest to the oldest, everyone adores these cookies. Their vibrant appearance, substantial size, and diverse flavors make them an instant hit at parties, potlucks, or simply as a comforting treat at home. Prepare for rave reviews and requests for the recipe!
  • Surprisingly Simple to Make: Despite the long list of ingredients, the preparation method is remarkably easy. Everything comes together in one large mixing bowl, minimizing cleanup and making the baking process a joy.
Tray of stacked monster cookies, highlighting their golden-brown edges and soft centers.

What’s in a Name? The Origin of Monster Cookies

The name “monster cookie” perfectly captures the essence of these magnificent treats. While there isn’t one definitive origin story, there are a couple of popular theories that truly resonate with this recipe.

One theory attributes the “monster” moniker to their impressive size. These aren’t your average, dainty cookies; they’re generously proportioned, often requiring a larger scoop or multiple tablespoons of dough to form each one. Their substantial presence on a plate certainly earns them the “monster-sized” title.

Another, perhaps more fitting, theory suggests the name comes from their “Frankenstein’s monster” quality. Just like the iconic fictional creature, monster cookies are brought to life by combining a medley of disparate, yet complementary, ingredients. Imagine taking the hearty chewiness of oatmeal cookies, the classic sweetness of chocolate chip cookies, the playful crunch of M&M cookies, and the irresistible nuttiness of peanut butter cookies, and then melding them all into one incredible super-cookie. This fusion of beloved flavors and textures creates a truly unique and irresistible dessert that stands head and shoulders above its individual components.

Regardless of the precise origin, the name “monster cookie” has stuck because it accurately conveys the colossal flavor and diverse ingredients that make these cookies so special.

Overhead view of various ingredients for monster cookies laid out on a surface, including M&M's, chocolate chips, oats, and peanut butter.

Gather Your Ingredients: What You’ll Need for Monster Cookies

Crafting the perfect monster cookie requires a thoughtful selection of ingredients, each playing a crucial role in achieving that signature texture and flavor. Below is a detailed breakdown of what you’ll need and why each component is important. For precise quantities and step-by-step instructions, please refer to the recipe card at the end of this post.

  • Eggs: Large eggs are essential for structure and binding. Bringing them to room temperature before mixing helps them emulsify better with the other ingredients, leading to a smoother, more uniform dough and ultimately a softer cookie texture.
  • Brown Sugar: We recommend using firmly packed light or dark brown sugar. Dark brown sugar will impart a richer, deeper molasses flavor, enhancing the overall complexity of the cookie. Brown sugar also contributes to the chewy texture and moisture content of the cookies.
  • Granulated Sugar: This provides additional sweetness and helps with the spread and crispness of the cookie edges, balancing the chewiness from the brown sugar and oats.
  • Vanilla Extract: A staple in almost any cookie recipe, vanilla extract adds a warm, aromatic depth of flavor that complements all the other sweet ingredients. Use good quality pure vanilla extract for the best results.
  • Corn Syrup: Light corn syrup is a secret weapon for maintaining chewiness and moisture in cookies. It helps prevent crystallization of sugars, keeping the cookies soft and tender in the center, while still allowing for slightly crisp edges.
  • Baking Soda: This leavening agent reacts with the acidic components (like brown sugar and peanut butter) to create carbon dioxide, giving the cookies a slight lift and contributing to their soft, tender crumb.
  • Salt: A pinch of salt is vital for balancing the sweetness and enhancing all the flavors in the cookie. It brings out the nuttiness of the peanut butter and the richness of the chocolate.
  • Unsalted Butter: Melted unsalted butter makes these monster cookies wonderfully soft and adds a subtle richness. It’s important to let the melted butter cool slightly before incorporating it into the egg mixture to prevent scrambling the eggs. Using unsalted butter allows you to control the exact amount of salt in the recipe. For more insights, explore the debate of unsalted vs. salted butter in baking.
  • Chunky Peanut Butter: The star of the show! Chunky peanut butter provides an incredible depth of flavor and fantastic texture with real peanut pieces. If you prefer a smoother cookie, creamy peanut butter works just as well. For those with allergies, feel free to substitute with another nut or seed butter of your choice. Opt for traditional, processed peanut butter (like Jif or Skippy) over natural peanut butter, as the latter can have varying oil content and affect the cookie’s consistency.
  • Rolled Oats (Old-Fashioned): These are crucial for the signature chewy texture and hearty structure of monster cookies. Their substantial nature absorbs moisture, helping the cookies hold their shape. Steer clear of quick oats, as they are cut finer and will result in a mushier texture, not the robust chew we’re aiming for. Learn more about the differences in our guide to rolled oats vs. quick oats.
  • All-Purpose Flour: The foundation of our cookie dough, all-purpose flour provides structure and body. Proper measurement is key to prevent dry or dense cookies, so we highly recommend checking out our comprehensive guide on how to measure flour correctly for all your baking endeavors.
  • Semi-Sweet Chocolate Chips: These classic chips melt beautifully, creating pockets of rich chocolatey goodness throughout the cookies. For a more rustic appearance and intense chocolate bursts, you can substitute with chocolate chunks. Mixing in some milk chocolate chips alongside semi-sweet can add an extra layer of sweetness if desired.
  • Butterscotch Chips: Adding a delightful, caramel-like sweetness, butterscotch chips contribute another layer of flavor and texture, making these cookies even more complex and enjoyable.
  • Mini or Regular M&M’s: Beyond their vibrant colors, M&M’s add a satisfying crunch and a familiar, sweet chocolate flavor. Feel free to use seasonal colors to make these monster cookies festive for holidays and special occasions!

Creative Monster Cookie Variations

The beauty of the monster cookie recipe lies in its adaptability. While the classic combination is always a hit, feel free to get creative and customize your batch with other favorite mix-ins. Here are some ideas to inspire your next baking adventure:

  • Nutty Additions: Introduce chopped pecans, walnuts, or almonds for extra crunch and nutty flavor. Toasted nuts will enhance their aroma and taste even further.
  • Different Chocolate Types: Experiment with white chocolate chips, dark chocolate chunks, or even a blend of different chocolate varieties to find your perfect balance.
  • Caramel or Toffee Bits: Swirl in some chewy caramel bits or crunchy toffee pieces for an extra layer of sweetness and texture.
  • Dried Fruits: For a touch of fruity chewiness, consider adding dried cranberries, raisins, or chopped dried apricots.
  • Spices: A hint of cinnamon or a dash of nutmeg can add a cozy, warm note, especially if you’re leaning into the oatmeal cookie aspect.
  • Pretzels: For a sweet and salty twist, crush some pretzels and fold them into the dough. The salty crunch perfectly complements the sweet and rich flavors.
  • Potato Chips: For the truly adventurous, crushed potato chips can add a surprising salty and savory element that is incredibly addictive.

Baking Guide: How to Make Irresistible Monster Cookies

Making these colossal cookies is simpler than you might think, especially with our step-by-step guide. Follow these instructions to achieve perfectly thick, chewy, and flavorful monster cookies every time.

Overhead view of sugar and eggs being combined in a large mixing bowl, the first step in making monster cookies.
Begin by thoroughly combining the eggs, both sugars, and vanilla extract until smooth.
A hand stirring the wet ingredients in a mixing bowl for monster cookies, showcasing the consistency of the mixture.
Next, incorporate the corn syrup, salt, and baking soda, followed by the cooled melted butter.
  • Step 1: Combine the Wet Ingredients and Sugars. In a large mixing bowl (preferably using a stand mixer with a paddle attachment for ease, or a large bowl with a sturdy whisk), combine the room temperature eggs, both brown and granulated sugars, and vanilla extract. Beat until the mixture is light, fluffy, and well-creamed. This initial step ensures all the sugars are properly dissolved, contributing to a smoother cookie texture. Then, add the corn syrup, baking soda, and salt, mixing until fully incorporated. Finally, pour in the slightly cooled melted unsalted butter and stir until just combined.
Flour, oats, and peanut butter being added to a bowl of monster cookie dough, showing the thickening texture.
The dough will become quite thick after adding the peanut butter, oats, and flour.
Mix-ins, including M&M's, chocolate chips, and butterscotch chips, folded into a bowl of monster cookie dough before chilling.
Generously fold in all your favorite mix-ins before the crucial chilling step.
  • Step 2: Incorporate Dry Ingredients and Mix-ins. Gradually add the chunky peanut butter, rolled oats, and all-purpose flour to the wet mixture. Mix on low speed (or stir vigorously by hand) until just combined. Be mindful not to overmix, as this can lead to tough cookies. The dough will appear somewhat loose and crumbly at this stage, which is perfectly normal. Finally, gently fold in the semi-sweet chocolate chips, butterscotch chips, and M&M’s until they are evenly distributed throughout the dough.
  • Step 3: Chill the Dough. This step is critical for developing flavor and achieving the right cookie texture. Cover the bowl of dough and refrigerate for at least 30 minutes. During this chilling period, the oats will absorb moisture from the butter and other wet ingredients, causing the dough to thicken and firm up. This prevents excessive spreading during baking, ensuring your cookies hold their signature monster shape.
  • Step 4: Prepare for Baking. While the dough chills, preheat your oven to 350°F (175°C). Line several baking sheets with silicone liners or parchment paper. This prevents sticking and promotes even browning, making for easier cleanup.
Overhead view of cookie dough portions neatly arranged on a baking sheet, with ample space between them.
Ensure sufficient space between each cookie dough ball to allow for proper expansion during baking.
Overhead view of monster cookies baking on a sheet, showing their slight golden brown edges.
The cookies are perfectly baked when they achieve a light golden-brown hue around the edges.
Overhead view of monster cookies cooling on a wire rack, ready for storage or serving.
Allow the cookies to cool completely before transferring them for storage.
  • Step 5: Form and Bake the Cookies. Using a 4-tablespoon cookie scoop (or measuring out generous portions), drop the dough onto the prepared baking sheets, leaving ample space between each cookie for spreading. Gently flatten the top of each cookie slightly with your palm or the back of a spoon. This encourages even spreading and helps achieve that classic cookie shape. Bake one sheet at a time in the center of your preheated oven for 12 to 15 minutes, or until the edges are lightly golden brown and the centers are still slightly soft. Baking one sheet at a time ensures consistent heat distribution and even baking. Keep any unbaked dough refrigerated between batches.
  • Step 6: Cool and Enjoy. Once baked, remove the cookies from the oven and let them cool on the baking sheet for about 10 minutes. This allows them to firm up slightly before handling. Then, carefully transfer the warm monster cookies directly to a wire rack to cool completely. Cooling on a wire rack allows air to circulate around the cookies, preventing them from becoming soggy on the bottom and ensuring they maintain their crisp edges and chewy centers. Discover why every baker needs wire cooling racks for optimal results.
A tray filled with freshly baked monster cookies, showcasing their perfect round shape and colorful toppings.

Expert Tips for Monster Cookie Success

Achieving bakery-quality monster cookies is within reach with these essential tips:

  • Embrace the Chill Time: Do not skip the chilling step! Refrigerating the dough for at least 30 minutes is crucial. This allows the rolled oats to fully absorb the liquids, preventing the cookies from spreading too much during baking and maintaining their thick, chewy texture. Furthermore, chilling helps to meld the flavors, resulting in a more complex and delicious cookie. A longer chill (up to 24 hours) can even deepen the flavors further.
  • Opt for Traditional Peanut Butter: For the best consistency and reliable results, stick with conventional, emulsified peanut butter brands like Jif or Skippy. Natural or freshly ground peanut butter can vary greatly in oil content and consistency, which might lead to unpredictable results in your cookie dough, such as excessive spreading or a greasy texture. The stability of traditional peanut butter is key to these cookies’ structure.
  • Customize Your Cookie Size: While these are “monster” cookies, you have full control over their size. If you prefer smaller cookies, use a 2-tablespoon scoop per cookie. Remember to adjust the baking time accordingly, typically reducing it by 2-3 minutes. Always keep a close eye on the cookies during the final minutes to prevent over-baking, which can lead to dry, crumbly cookies.
  • Gentle Flattening is Key: Before baking, lightly flatten the top of each cookie dough ball. A quick press with the palm of your hand or the bottom of a glass will suffice. This small step helps the cookies spread more evenly and ensures they bake through without a raw center, giving them that perfectly round, classic cookie shape.
  • Bake One Sheet at a Time: For consistent and even baking, always bake one sheet of cookies at a time, positioned in the center rack of your oven. This prevents uneven heat distribution, which can result in some cookies being undercooked and others overcooked. If you need to reuse baking sheets, make sure they have completely cooled down to room temperature before placing fresh dough on them. Placing dough on a warm sheet can cause the butter to melt prematurely, leading to excessive spreading.
  • Don’t Overmix the Dough: Once you add the flour and oats, mix just until combined. Overmixing develops the gluten in the flour, which can lead to tough, dense cookies instead of soft and chewy ones.
  • Freshness of Leavening Agents: Ensure your baking soda is fresh. Over time, leavening agents lose their potency, which can result in flat or dense cookies. You can test your baking soda by adding a teaspoon to a bit of vinegar; if it fizzes, it’s still good!
Overhead view of monster cookies arranged on three different plates, ready to be served or shared.

Proper Storage for Maximum Freshness

Once you’ve baked a batch of these glorious monster cookies, you’ll want to ensure they stay fresh for as long as possible. Here’s how to store both baked cookies and unbaked dough:

  • At Room Temperature: To keep your monster cookies perfectly fresh and chewy, store them in an airtight container at room temperature. They will remain delicious for 2 to 3 days. A bread slice placed in the container can sometimes help keep them softer by transferring its moisture, though with these chewy cookies, it’s often not necessary.
  • Freezer Storage for Baked Cookies: For longer enjoyment, monster cookies freeze exceptionally well. Once completely cooled, place them in an airtight, freezer-safe container or a heavy-duty freezer bag. They can be stored for up to 3 months. To enjoy, simply let them thaw at room temperature for an hour or two, or pop them into the microwave for a brief warm-up (10-20 seconds) for that freshly baked feel.
  • Freezing the Cookie Dough: Want to have freshly baked monster cookies on demand? You can easily freeze the dough! Scoop the dough into individual portions (as if you were going to bake them), place them on a parchment-lined baking sheet, and freeze until solid (about 1-2 hours). Once firm, transfer the frozen dough balls to an airtight, freezer-safe bag or container. They can be stored for up to 3 months. When you’re ready to bake, there’s no need to thaw! Simply arrange the frozen dough balls on a prepared baking sheet and add a few extra minutes (typically 3-5 minutes) to the baking time. This method is perfect for unexpected guests or a sudden cookie craving. Learn more about the best practices for how to freeze drop cookie dough.
Overhead view of a single monster cookie on a white plate, highlighting its detailed texture and mix-ins.

Discover More Fun Cookie Recipes

Sprinkle Chocolate Chip Cookies
Kitchen Sink Cookies
Strawberry M&M Cookies
Waffle Cookies
Overhead view of monster cookies on platter




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Monster Cookies

Yield: 24 cookies
Prep Time: 20 minutes
Cook Time: 15 minutes
Additional Time: 30 minutes
Total Time: 1 hour 2 minutes
Monster cookies are big, chewy cookies packed with chocolate chips, M&Ms, butterscotch, rolled oats, peanut butter, and more. These are irresistible!
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Ingredients

  • 3 large eggs
  • 1 cup (200 g) firmly packed light or dark brown sugar
  • 1 cup (200 g) granulated sugar
  • 1 teaspoon vanilla extract
  • 1 teaspoon corn syrup
  • 2 teaspoons baking soda
  • 1 teaspoon salt
  • ½ cup (113 g) unsalted butter, melted
  • 1 ½ cups (382 g) chunky peanut butter
  • 4 ½ cups (445 g) old-fashioned rolled oats
  • ½ cup (60 g) all-purpose flour
  • ¾ cup (127 g) semi-sweet chocolate chips
  • ¾ cup (127 g) butterscotch chips
  • ¾ cup mini or regular M&Ms

Recommended Products

  • Half Sheet Pans
  • 4-Tablespoon Scoop
  • Half Sheet Nonstick Cooling Rack

Instructions

 

  • Combine the eggs, both sugars, vanilla, corn syrup, baking soda, and salt in a large mixing bowl. Stir in the melted butter.
  • Next add the peanut butter, oats, and flour and mix thoroughly. Stir in the chocolate chips, butterscotch chips, and M&Ms. The dough will be a bit loose.
  • Chill the dough for about 30 minutes to allow the oats to absorb the butter.
  • Preheat oven to 350°F (175°C). Line baking sheets with silicone liners or parchment paper.
  • Drop the dough by 4-tablespoon portions onto the prepared baking sheets. Flatten the top of each cookie slightly.
  • Bake (one pan at a time) for 12 to 15 minutes or until lightly browned. Keep the remaining dough refrigerated between batches.
  • Cool the cookies on the pan on a wire rack for about 10 minutes, then carefully transfer the cookies from the pan directly to a wire rack to cool completely.

Video

Notes

  • Yield: This recipe typically yields around 24 generous large cookies.
  • To Store Baked Cookies: For optimal freshness and chewiness, store any leftover monster cookies in an airtight container at room temperature for up to 2 to 3 days.
  • To Freeze Baked Cookies: Once completely cooled, baked monster cookies can be frozen in an airtight, freezer-safe container or a heavy-duty freezer bag for up to 3 months. Thaw at room temperature or briefly warm in the microwave.
  • Freezing Cookie Dough for Later: The unbaked dough is also freezer-friendly. Portion the dough into balls, freeze until solid on a baking sheet, then transfer to a freezer-safe bag. Add a few extra minutes to the baking time when baking from frozen.
Author: Jennifer McHenry
Course: cookies
Cuisine: American
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